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    "model": "qwen36-27b-fp8",
    "started_at": "2026-07-12T17:50:31Z"
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              "content": "\n\nThe pituitary gland is located at the base of the brain, nestled in a bony depression of the sphenoid bone called the sella turcica. The brain and its associated structures are enclosed within the skull, which anatomically defines the **cranial cavity**. \n\nWhile the cranial cavity is a subdivision of the larger dorsal body cavity, option J is the most specific and precise anatomical designation for the space containing the pituitary gland.\n\nFINAL=J",
              "content_excerpt": "\n\nThe pituitary gland is located at the base of the brain, nestled in a bony depression of the sphenoid bone called the sella turcica. The brain and its associated structures are enclosed within the s",
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          "content": "\n\nThe pituitary gland is located at the base of the brain, nestled in a bony depression of the sphenoid bone called the sella turcica. The brain and its associated structures are enclosed within the skull, which anatomically defines the **cranial cavity**. \n\nWhile the cranial cavity is a subdivision of the larger dorsal body cavity, option J is the most specific and precise anatomical designation for the space containing the pituitary gland.\n\nFINAL=J",
          "content_excerpt": "\n\nThe pituitary gland is located at the base of the brain, nestled in a bony depression of the sphenoid bone called the sella turcica. The brain and its associated structures are enclosed within the s",
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              "content": "\n\nThe light-gathering power of an optical instrument is directly proportional to the area of its aperture. Since the area of a circle is proportional to the square of its diameter, we can find the light-gathering ratio by squaring the ratio of the two diameters.\n\n1. **Convert to consistent units:** \n   Telescope aperture = 50 cm = 500 mm\n   Eye pupil diameter = 5 mm\n\n2. **Find the ratio of the diameters:**\n   500 mm / 5 mm = 100\n\n3. **Square the ratio to get the area (light-gathering) ratio:**\n   100² = 10,000\n\nTherefore, the telescope gathers 10,000 times more light than the human eye.\n\nFINAL=E",
              "content_excerpt": "\n\nThe light-gathering power of an optical instrument is directly proportional to the area of its aperture. Since the area of a circle is proportional to the square of its diameter, we can find the lig",
              "failure_class": null,
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              "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze User Input:**\n   - Question: \"Say the pupil of your eye has a diameter of 5 mm and you have a telescope with an aperture of 50 cm. How much more light can the",
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          "content": "\n\nThe light-gathering power of an optical instrument is directly proportional to the area of its aperture. Since the area of a circle is proportional to the square of its diameter, we can find the light-gathering ratio by squaring the ratio of the two diameters.\n\n1. **Convert to consistent units:** \n   Telescope aperture = 50 cm = 500 mm\n   Eye pupil diameter = 5 mm\n\n2. **Find the ratio of the diameters:**\n   500 mm / 5 mm = 100\n\n3. **Square the ratio to get the area (light-gathering) ratio:**\n   100² = 10,000\n\nTherefore, the telescope gathers 10,000 times more light than the human eye.\n\nFINAL=E",
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          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze User Input:**\n   - Question: \"Say the pupil of your eye has a diameter of 5 mm and you have a telescope with an aperture of 50 cm. How much more light can the",
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              "content": "\n\nHere's a step-by-step breakdown of the reasoning:\n\n1. **Blanks 1 & 2**: The sentence establishes a direct contrast between two forms of consumer activism. *Boycotts* are well-known campaigns where consumers refuse to buy products to punish companies for unethical or harmful practices. The opposite approach, which actively encourages purchasing to *reward* positive corporate behavior, is academically and commonly referred to as *buycotts*. Therefore, Blank 1 = **Boycotts** and Blank 2 = **Buycotts**.\n\n2. **Blank 3**: The reach, speed, and coordination of modern consumer campaigns have been dramatically amplified by social media, e-commerce platforms, online petitions, and mobile apps. This is best described as **Digital technology**. \"Blockchain technology\" is too narrow and not a primary driver of general campaign success, while \"Physical technology\" is irrelevant to this context.\n\n3. **Blank 4**: The explicit goal of a buycott is to drive consumer purchases toward a company as a reward for its favorable actions. This directly helps the company achieve **Increased Sales**. \"Decreased Sales\" contradicts the reward mechanism, and \"Charitable donations\" is not the standard corporate outcome measured in this type of consumer activism framework.\n\nMatching these conclusions to the given options yields: **Boycotts, Buycotts, Digital technology, Increased Sales**, which corresponds exactly to Option F.\n\nFINAL=F",
              "content_excerpt": "\n\nHere's a step-by-step breakdown of the reasoning:\n\n1. **Blanks 1 & 2**: The sentence establishes a direct contrast between two forms of consumer activism. *Boycotts* are well-known campaigns where c",
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          "content": "\n\nHere's a step-by-step breakdown of the reasoning:\n\n1. **Blanks 1 & 2**: The sentence establishes a direct contrast between two forms of consumer activism. *Boycotts* are well-known campaigns where consumers refuse to buy products to punish companies for unethical or harmful practices. The opposite approach, which actively encourages purchasing to *reward* positive corporate behavior, is academically and commonly referred to as *buycotts*. Therefore, Blank 1 = **Boycotts** and Blank 2 = **Buycotts**.\n\n2. **Blank 3**: The reach, speed, and coordination of modern consumer campaigns have been dramatically amplified by social media, e-commerce platforms, online petitions, and mobile apps. This is best described as **Digital technology**. \"Blockchain technology\" is too narrow and not a primary driver of general campaign success, while \"Physical technology\" is irrelevant to this context.\n\n3. **Blank 4**: The explicit goal of a buycott is to drive consumer purchases toward a company as a reward for its favorable actions. This directly helps the company achieve **Increased Sales**. \"Decreased Sales\" contradicts the reward mechanism, and \"Charitable donations\" is not the standard corporate outcome measured in this type of consumer activism framework.\n\nMatching these conclusions to the given options yields: **Boycotts, Buycotts, Digital technology, Increased Sales**, which corresponds exactly to Option F.\n\nFINAL=F",
          "content_excerpt": "\n\nHere's a step-by-step breakdown of the reasoning:\n\n1. **Blanks 1 & 2**: The sentence establishes a direct contrast between two forms of consumer activism. *Boycotts* are well-known campaigns where c",
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          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - The user provides a fill-in-the-blank question with 10 options (A-J).\n   - The sentence: \"In contrast to _______, _______ aim to reward",
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              "content": "\n\nLet's evaluate each option based on established arthropod biology:\n\n- **Option A** is incorrect. Arthropod exoskeletons are primarily composed of **chitin** and structural proteins, not peptidoglycan (which is a key component of bacterial cell walls).\n- **Option B** is correct. Arthropods characteristically possess an **open circulatory system** where hemolymph is pumped by a tubular **dorsal heart** into the hemocoel, directly bathing internal organs.\n- **Option C** is incorrect. Arthropoda is the most species-rich and ecologically **successful** animal phylum, thriving in nearly every terrestrial, freshwater, and marine habitat with highly diverse diets and life histories.\n- **Option D** is incorrect. The name \"Arthropoda\" literally translates to \"jointed feet,\" and **paired, jointed appendages** are a defining evolutionary hallmark of the phylum.\n\nTherefore, the only accurate statement is B.\n\nFINAL=B",
              "content_excerpt": "\n\nLet's evaluate each option based on established arthropod biology:\n\n- **Option A** is incorrect. Arthropod exoskeletons are primarily composed of **chitin** and structural proteins, not peptidoglyca",
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          "content": "\n\nLet's evaluate each option based on established arthropod biology:\n\n- **Option A** is incorrect. Arthropod exoskeletons are primarily composed of **chitin** and structural proteins, not peptidoglycan (which is a key component of bacterial cell walls).\n- **Option B** is correct. Arthropods characteristically possess an **open circulatory system** where hemolymph is pumped by a tubular **dorsal heart** into the hemocoel, directly bathing internal organs.\n- **Option C** is incorrect. Arthropoda is the most species-rich and ecologically **successful** animal phylum, thriving in nearly every terrestrial, freshwater, and marine habitat with highly diverse diets and life histories.\n- **Option D** is incorrect. The name \"Arthropoda\" literally translates to \"jointed feet,\" and **paired, jointed appendages** are a defining evolutionary hallmark of the phylum.\n\nTherefore, the only accurate statement is B.\n\nFINAL=B",
          "content_excerpt": "\n\nLet's evaluate each option based on established arthropod biology:\n\n- **Option A** is incorrect. Arthropod exoskeletons are primarily composed of **chitin** and structural proteins, not peptidoglyca",
          "failure_class": null,
          "finish_reason": "stop",
          "id": "mmlu-pro-20-biology",
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          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - Question: \"Which of the following represents an accurate statement concerning arthropods?\"\n   - Options: A, B, C, D, E-J (N/A)\n   - Nee",
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              "content": "\n\nTo determine the number of lines in the EPR spectrum of the $^{13}\\text{C}$-labelled methyl radical ($^{13}\\text{CH}_3$), we must analyze the hyperfine coupling between the unpaired electron and the magnetic nuclei present in the molecule.\n\n1.  **Identify the Magnetic Nuclei:**\n    The radical $^{13}\\text{CH}_3$ contains:\n    *   Three Hydrogen nuclei ($^1\\text{H}$).\n    *   One Carbon-13 nucleus ($^{13}\\text{C}$).\n\n2.  **Determine Nuclear Spin Quantum Numbers ($I$):**\n    *   The nuclear spin of a proton ($^1\\text{H}$) is $I = 1/2$.\n    *   The nuclear spin of Carbon-13 ($^{13}\\text{C}$) is $I = 1/2$. (Note: The most common isotope, $^{12}\\text{C}$, has $I=0$ and does not cause splitting, but the problem specifies $^{13}\\text{C}$).\n\n3.  **Calculate Splitting from Equivalent Nuclei:**\n    The three hydrogen atoms in a methyl radical are chemically and magnetically equivalent. The number of lines ($N$) generated by coupling to $n$ equivalent nuclei of spin $I$ is given by the formula:\n    $$N = 2nI + 1$$\n    For the three protons ($n=3, I=1/2$):\n    $$N_H = 2(3)(1/2) + 1 = 3 + 1 = 4$$\n    This results in a quartet (4 lines).\n\n4.  **Calculate Splitting from Non-Equivalent Nuclei:**\n    The Carbon-13 nucleus is distinct from the protons (non-equivalent).\n    For the single Carbon-13 nucleus ($n=1, I=1/2$):\n    $$N_C = 2(1)(1/2) + 1 = 1 + 1 = 2$$\n    This results in a doublet (2 lines).\n\n5.  **Calculate Total Number of Lines:**\n    Since the problem states that the lines do not overlap, the total number of lines is the product of the multiplicities arising from each set of nuclei.\n    $$\\text{Total Lines} = N_H \\times N_C$$\n    $$\\text{Total Lines} = 4 \\times 2 = 8$$\n\nThe spectrum will consist of 8 lines.\n\nFINAL=B",
              "content_excerpt": "\n\nTo determine the number of lines in the EPR spectrum of the $^{13}\\text{C}$-labelled methyl radical ($^{13}\\text{CH}_3$), we must analyze the hyperfine coupling between the unpaired electron and the",
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              "reasoning_excerpt": "Here's a thinking process to arrive at the correct answer:\n\n1.  **Analyze the Request:**\n    *   **Subject:** Electron Paramagnetic Resonance (EPR) spectroscopy (also known as Electron Spin Resonance,",
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          "content": "\n\nTo determine the number of lines in the EPR spectrum of the $^{13}\\text{C}$-labelled methyl radical ($^{13}\\text{CH}_3$), we must analyze the hyperfine coupling between the unpaired electron and the magnetic nuclei present in the molecule.\n\n1.  **Identify the Magnetic Nuclei:**\n    The radical $^{13}\\text{CH}_3$ contains:\n    *   Three Hydrogen nuclei ($^1\\text{H}$).\n    *   One Carbon-13 nucleus ($^{13}\\text{C}$).\n\n2.  **Determine Nuclear Spin Quantum Numbers ($I$):**\n    *   The nuclear spin of a proton ($^1\\text{H}$) is $I = 1/2$.\n    *   The nuclear spin of Carbon-13 ($^{13}\\text{C}$) is $I = 1/2$. (Note: The most common isotope, $^{12}\\text{C}$, has $I=0$ and does not cause splitting, but the problem specifies $^{13}\\text{C}$).\n\n3.  **Calculate Splitting from Equivalent Nuclei:**\n    The three hydrogen atoms in a methyl radical are chemically and magnetically equivalent. The number of lines ($N$) generated by coupling to $n$ equivalent nuclei of spin $I$ is given by the formula:\n    $$N = 2nI + 1$$\n    For the three protons ($n=3, I=1/2$):\n    $$N_H = 2(3)(1/2) + 1 = 3 + 1 = 4$$\n    This results in a quartet (4 lines).\n\n4.  **Calculate Splitting from Non-Equivalent Nuclei:**\n    The Carbon-13 nucleus is distinct from the protons (non-equivalent).\n    For the single Carbon-13 nucleus ($n=1, I=1/2$):\n    $$N_C = 2(1)(1/2) + 1 = 1 + 1 = 2$$\n    This results in a doublet (2 lines).\n\n5.  **Calculate Total Number of Lines:**\n    Since the problem states that the lines do not overlap, the total number of lines is the product of the multiplicities arising from each set of nuclei.\n    $$\\text{Total Lines} = N_H \\times N_C$$\n    $$\\text{Total Lines} = 4 \\times 2 = 8$$\n\nThe spectrum will consist of 8 lines.\n\nFINAL=B",
          "content_excerpt": "\n\nTo determine the number of lines in the EPR spectrum of the $^{13}\\text{C}$-labelled methyl radical ($^{13}\\text{CH}_3$), we must analyze the hyperfine coupling between the unpaired electron and the",
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          "reasoning_excerpt": "Here's a thinking process that leads to the solution:\n\n1.  **Analyze the Problem Statement:**\n\n    *   **Architecture:** Pipelined RISC machine.\n    *   **Registers:** R0 through R7 (8 registers).\n   ",
          "reasoning_field": "reasoning",
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              "content": "\n\nIn a stationary autoregressive (AR) process, the key defining feature is that the process reverts to its long-run mean over time. Mathematically, for an AR(1) process $X_t = \\phi X_{t-1} + \\varepsilon_t$, stationarity requires $|\\phi| < 1$. When a shock $\\varepsilon_t$ occurs, its effect on future values is given by the impulse response function: the impact on $X_{t+h}$ is $\\phi^h \\varepsilon_t$. Because $|\\phi| < 1$, $\\phi^h \\to 0$ as $h \\to \\infty$, meaning the influence of the shock decays geometrically and **eventually dies away**.\n\nLet's quickly rule out the other options:\n- A, H: Shocks do occur and don't vanish instantly; they have a decaying but multi-period effect.\n- B, C: Permanent persistence or trend changes characterize non-stationary processes (e.g., random walks with unit roots).\n- D: Exponential growth implies an explosive, non-stationary process ($|\\phi| > 1$).\n- E: Shocks affect multiple future periods, not just the next one.\n- G: Shocks are realizations of the error term; they don't alter the underlying parameters or stationarity property.\n- I: Cycles only arise under specific conditions (complex roots), not as a general rule for all stationary AR processes.\n- J: Shocks are typically assumed independent/uncorrelated; they don't systematically cancel each other out.\n\nThus, the defining behavior of shocks in a stationary AR process is that their effects are temporary and fade over time.\n\nFINAL=F",
              "content_excerpt": "\n\nIn a stationary autoregressive (AR) process, the key defining feature is that the process reverts to its long-run mean over time. Mathematically, for an AR(1) process $X_t = \\phi X_{t-1} + \\varepsil",
              "failure_class": null,
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              "latency_ms": 15686.231851577759,
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              "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** For a stationary autoregressive process, shocks will...\n   - **Options:** A through J\n   - **Task:** Reason through the q",
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          "content": "\n\nIn a stationary autoregressive (AR) process, the key defining feature is that the process reverts to its long-run mean over time. Mathematically, for an AR(1) process $X_t = \\phi X_{t-1} + \\varepsilon_t$, stationarity requires $|\\phi| < 1$. When a shock $\\varepsilon_t$ occurs, its effect on future values is given by the impulse response function: the impact on $X_{t+h}$ is $\\phi^h \\varepsilon_t$. Because $|\\phi| < 1$, $\\phi^h \\to 0$ as $h \\to \\infty$, meaning the influence of the shock decays geometrically and **eventually dies away**.\n\nLet's quickly rule out the other options:\n- A, H: Shocks do occur and don't vanish instantly; they have a decaying but multi-period effect.\n- B, C: Permanent persistence or trend changes characterize non-stationary processes (e.g., random walks with unit roots).\n- D: Exponential growth implies an explosive, non-stationary process ($|\\phi| > 1$).\n- E: Shocks affect multiple future periods, not just the next one.\n- G: Shocks are realizations of the error term; they don't alter the underlying parameters or stationarity property.\n- I: Cycles only arise under specific conditions (complex roots), not as a general rule for all stationary AR processes.\n- J: Shocks are typically assumed independent/uncorrelated; they don't systematically cancel each other out.\n\nThus, the defining behavior of shocks in a stationary AR process is that their effects are temporary and fade over time.\n\nFINAL=F",
          "content_excerpt": "\n\nIn a stationary autoregressive (AR) process, the key defining feature is that the process reverts to its long-run mean over time. Mathematically, for an AR(1) process $X_t = \\phi X_{t-1} + \\varepsil",
          "failure_class": null,
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          "id": "mmlu-pro-35-economics",
          "latency_ms": 15686.231851577759,
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          "reasoning_chars": 3950,
          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** For a stationary autoregressive process, shocks will...\n   - **Options:** A through J\n   - **Task:** Reason through the q",
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              "reasoning_chars": 10753,
              "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze User Input:**\n   - **Question:** A point pole has a strength of $4\\pi \\times 10^{-4}$ weber. The force in newtons on a point pole of $4\\pi \\times 1.5 \\times 1",
              "reasoning_field": "reasoning",
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          "id": "mmlu-pro-40-engineering",
          "latency_ms": 44081.721782684326,
          "pass_count": 0,
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          "reasoning_chars": 10753,
          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze User Input:**\n   - **Question:** A point pole has a strength of $4\\pi \\times 10^{-4}$ weber. The force in newtons on a point pole of $4\\pi \\times 1.5 \\times 1",
          "reasoning_field": "reasoning",
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              "content": "\n\nTo determine the correct symbolization, we break the sentence into its logical components and apply standard translation rules for propositional logic:\n\n1. **Identify the atomic propositions:**\n   - `L` = Turtles live long lives\n   - `H` = Turtles are happy creatures\n   - `I` = Turtles are injured\n\n2. **Identify the logical structure:**\n   The sentence reads: `\"(L and H) unless I.\"`\n\n3. **Translate \"unless\":**\n   In formal propositional logic, the connective `\"P unless Q\"` is standardly translated as a material disjunction: `P ∨ Q`. This is logically equivalent to `¬Q → P` (if they are not injured, then they live long lives and are happy), but the direct symbolic form taught in logic courses is `P ∨ Q`.\n\n4. **Apply to the statement:**\n   - `P` = `(L ∧ H)`\n   - `Q` = `I`\n   - Translation: `(L ∧ H) ∨ I`\n\n5. **Match with the options:**\n   - A. `(L and H) iff I` → Incorrect (uses biconditional)\n   - **B. `(L and H) or I` → Correct (matches `(L ∧ H) ∨ I`)**\n   - C. `L and (H or I)` → Incorrect (changes the scope/grouping of the connectives)\n   - D. `L and (H implies R)` → Incorrect (introduces an undefined variable `R` and wrong structure)\n\nFINAL=B",
              "content_excerpt": "\n\nTo determine the correct symbolization, we break the sentence into its logical components and apply standard translation rules for propositional logic:\n\n1. **Identify the atomic propositions:**\n   -",
              "failure_class": null,
              "finish_reason": "stop",
              "latency_ms": 26153.706789016724,
              "reasoning_chars": 6972,
              "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** Which formula of propositional logic best symbolizes: \"Turtles live long lives and are happy creatures, unless they are i",
              "reasoning_field": "reasoning",
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          "content": "\n\nTo determine the correct symbolization, we break the sentence into its logical components and apply standard translation rules for propositional logic:\n\n1. **Identify the atomic propositions:**\n   - `L` = Turtles live long lives\n   - `H` = Turtles are happy creatures\n   - `I` = Turtles are injured\n\n2. **Identify the logical structure:**\n   The sentence reads: `\"(L and H) unless I.\"`\n\n3. **Translate \"unless\":**\n   In formal propositional logic, the connective `\"P unless Q\"` is standardly translated as a material disjunction: `P ∨ Q`. This is logically equivalent to `¬Q → P` (if they are not injured, then they live long lives and are happy), but the direct symbolic form taught in logic courses is `P ∨ Q`.\n\n4. **Apply to the statement:**\n   - `P` = `(L ∧ H)`\n   - `Q` = `I`\n   - Translation: `(L ∧ H) ∨ I`\n\n5. **Match with the options:**\n   - A. `(L and H) iff I` → Incorrect (uses biconditional)\n   - **B. `(L and H) or I` → Correct (matches `(L ∧ H) ∨ I`)**\n   - C. `L and (H or I)` → Incorrect (changes the scope/grouping of the connectives)\n   - D. `L and (H implies R)` → Incorrect (introduces an undefined variable `R` and wrong structure)\n\nFINAL=B",
          "content_excerpt": "\n\nTo determine the correct symbolization, we break the sentence into its logical components and apply standard translation rules for propositional logic:\n\n1. **Identify the atomic propositions:**\n   -",
          "failure_class": null,
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          "id": "mmlu-pro-45-philosophy",
          "latency_ms": 26153.706789016724,
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          "reasoning_chars": 6972,
          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** Which formula of propositional logic best symbolizes: \"Turtles live long lives and are happy creatures, unless they are i",
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              "content": "\n\nThe term **judge ad hoc** is a specific feature of the International Court of Justice (ICJ) governed by Article 31 of the ICJ Statute. Here's a breakdown of why the options succeed or fail:\n\n- **A** is incorrect: The President of the ICJ is elected from among the 15 permanent judges for a three-year term, not appointed ad hoc.\n- **B** is incorrect: A judge ad hoc is appointed for a specific *case*, not a fixed time period.\n- **C** is incorrect: Parties do not always nominate one; they only have the right to do so if they lack a judge of their nationality on the permanent bench.\n- **D** is incorrect: The ICJ decides cases by majority vote. There is no casting vote mechanism.\n- **E** is incorrect: Nationality is the defining trigger. The right to appoint a judge ad hoc exists precisely because a party lacks a national judge on the bench.\n- **F** is incorrect: Questions of admissibility and jurisdiction are decided by the Court as a whole, not by a single judge.\n- **G** is incorrect: Judges ad hoc are appointed directly by the parties to the dispute, not by the UN Security Council.\n- **H** is incorrect: Vacancies caused by death, resignation, or disqualification are filled through a separate statutory replacement procedure, not via the ad hoc mechanism.\n- **I** is correct: This accurately reflects Article 31 of the ICJ Statute. When a party to a contentious case does not have a judge of its nationality sitting on the Court, it may appoint a judge ad hoc to participate solely in that specific case.\n\nFINAL=I",
              "content_excerpt": "\n\nThe term **judge ad hoc** is a specific feature of the International Court of Justice (ICJ) governed by Article 31 of the ICJ Statute. Here's a breakdown of why the options succeed or fail:\n\n- **A**",
              "failure_class": null,
              "finish_reason": "stop",
              "latency_ms": 24606.287240982056,
              "reasoning_chars": 7776,
              "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** What is the judge ad hoc?\n   - **Options:** A through J\n   - **Task:** Reason through the options, then output FINAL=<let",
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          "content": "\n\nThe term **judge ad hoc** is a specific feature of the International Court of Justice (ICJ) governed by Article 31 of the ICJ Statute. Here's a breakdown of why the options succeed or fail:\n\n- **A** is incorrect: The President of the ICJ is elected from among the 15 permanent judges for a three-year term, not appointed ad hoc.\n- **B** is incorrect: A judge ad hoc is appointed for a specific *case*, not a fixed time period.\n- **C** is incorrect: Parties do not always nominate one; they only have the right to do so if they lack a judge of their nationality on the permanent bench.\n- **D** is incorrect: The ICJ decides cases by majority vote. There is no casting vote mechanism.\n- **E** is incorrect: Nationality is the defining trigger. The right to appoint a judge ad hoc exists precisely because a party lacks a national judge on the bench.\n- **F** is incorrect: Questions of admissibility and jurisdiction are decided by the Court as a whole, not by a single judge.\n- **G** is incorrect: Judges ad hoc are appointed directly by the parties to the dispute, not by the UN Security Council.\n- **H** is incorrect: Vacancies caused by death, resignation, or disqualification are filled through a separate statutory replacement procedure, not via the ad hoc mechanism.\n- **I** is correct: This accurately reflects Article 31 of the ICJ Statute. When a party to a contentious case does not have a judge of its nationality sitting on the Court, it may appoint a judge ad hoc to participate solely in that specific case.\n\nFINAL=I",
          "content_excerpt": "\n\nThe term **judge ad hoc** is a specific feature of the International Court of Justice (ICJ) governed by Article 31 of the ICJ Statute. Here's a breakdown of why the options succeed or fail:\n\n- **A**",
          "failure_class": null,
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          "id": "mmlu-pro-65-law",
          "latency_ms": 24606.287240982056,
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          "reasoning_chars": 7776,
          "reasoning_excerpt": "Here's a thinking process:\n\n1.  **Analyze the User Input:**\n   - **Question:** What is the judge ad hoc?\n   - **Options:** A through J\n   - **Task:** Reason through the options, then output FINAL=<let",
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      "date": "2026-07-12",
      "source": "tests/fixtures/eval-data/hf-mmlu-pro-10-repeated.suite.json",
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