Fit agreement · eligible for rank
P15: Unknown is not impossible
Ask the model to distinguish missing measurement evidence from evidence that fitting is impossible.
Changes from the base question.
Changes from P2: Removed words Added words. Unmarked wording is unchanged. The exact sent prompt is preserved separately below.
Can the IKEA KARLBY countertop in the 98-inch size, which measures 98 inches long × 25 5/8 inches deep × 1 1/2 inches thick, fit inside a third-generation (2016) Honda Fit?[Added] If you lack a reliable interior measurement, explicitly say what is unknown. Do not treat missing information alone as proof that it cannot fit.
Read the P2 base question
Can the IKEA KARLBY countertop in the 98-inch size, which measures 98 inches long × 25 5/8 inches deep × 1 1/2 inches thick, fit inside a third-generation (2016) Honda Fit?
The exact prompt sent.
Can the IKEA KARLBY countertop in the 98-inch size, which measures 98 inches long × 25 5/8 inches deep × 1 1/2 inches thick, fit inside a third-generation (2016) Honda Fit? If you lack a reliable interior measurement, explicitly say what is unknown. Do not treat missing information alone as proof that it cannot fit.
No owner-reported answer key is included. Download the exact experiment definition.
One question, every model.
Selected outcomes only; every row links to exact output, request settings, and full attempt history. Focus this region and use arrow keys, or swipe, to scroll on small screens.
| Model | Reviewed label / status | Review reason / coverage note | Exact text & provenance |
|---|---|---|---|
| Google: Gemini 3.5 Flash Lite | YES | Clearly affirms diagonal fit with folded seats, possible unboxing and likely hatch closure; unknown dashboard clearance and a hatch-ajar fallback qualify but do not reverse that stance. | Exact answer & settings 2 attempt records |
| StepFun: Step 5 Preview | Uncertain | Withholds a fit verdict pending internal straight-line/diagonal length, opening clearance, and loading-path measurements, including front-passenger-seat adjustment and keeping the piece entirely inside. | Exact answer & settings 2 attempt records |
| DeepSeek: DeepSeek V4.1 Flash 1017 | Uncertain | Calls overall fit unconfirmed: its likely negative concerns the normal straight arrangement, while diagonal placement and width clearance remain decisive unknowns. It does not settle whether a tilted full-cabin fit works. | Exact answer & settings 2 attempt records |
| Meta: Muse Wonder | Uncertain | Leaves enclosed fit unverified and identifies a diagonal toward the passenger footwell as plausible but unmeasured, including clearance for the slab's width. Its advice not to buy expecting success is not a settled physical no. | Exact answer & settings 2 attempt records |
| Anthropic: Claude Sonnet 5.5 | Uncertain | Offers only a plausible, conditional fit with the passenger seat reclined and the slab angled; trusted length and diagonal measurements are missing, and a slightly open hatch is another conditional option. | Exact answer & settings 2 attempt records |
| Meta: Muse Glimmer 30B | NO | Says the length will not fit and concludes that enclosed fit is extremely unlikely using estimated cargo lengths and diagonals. Acknowledges that exact maximum clearance with the front seat repositioned is unknown, so impossibility is not measured proof. | Exact answer & settings 2 attempt records |
| OpenAI: GPT-6 Luna | Uncertain | Explicitly concludes unknown rather than no; straight cargo-floor loading is unlikely, but diagonal or front-passenger-area loading remains open without reliable path and hatch measurements. | Exact answer & settings 2 attempt records |
| SpaceXAI: Grok 4.7 | Uncertain | Explicitly says fit is unknown because usable cabin and diagonal clearances with seats moved are unavailable, and does not treat missing data as proof of failure. | Exact answer & settings 2 attempt records |
| Anthropic: Claude Haiku 5.5 | YES | Explicit probable yes only diagonally toward the front passenger footwell with rear seats folded and the passenger seat moved forward; hatch and diagonal clearances remain unverified. | Exact answer & settings 2 attempt records |
| Anthropic: Claude Opus 5.5 | NO | Gives a probable no specifically with the hatch closed, not proven impossibility; the unverified Long Mode limit, slab width, and uncertain diagonal clearance drive that assessment. | Exact answer & settings 2 attempt records |
| Google: Gemini 3.8 Flash | NO | Calls closed-hatch fit extremely unlikely or impossible based on asserted length and width limits; its affirmative alternative explicitly leaves one to two feet protruding. | Exact answer & settings 2 attempt records |
| Google: Gemini 4 Argon | NO | Categorically rejects full interior fit, assuming hatch closure and asserted 94.5-inch Long Mode capacity; acknowledges missing exact diagonal clearance but still issues NO. | Exact answer & settings 2 attempt records |
| IBM: Granite 4.2 8B | Uncertain | Explicitly withholds a yes/no because usable interior dimensions, orientation, and obstructions are unknown; does not infer impossibility from missing measurements. | Exact answer & settings 2 attempt records |
| Meta: Muse Spark Open | NO | Gives a clear probable negative for fully enclosed, flat transport despite lacking an exact factory length. It rules out diagonal rescue by assuming the slab must remain essentially level to avoid obstructions and breakage. | Exact answer & settings 2 attempt records |
| Mistral: Ministral 3 3B 2512 | NO | Explicitly rejects fit in the standard configuration, relying on an estimated 67.5-inch rear-seats-folded cargo length. Treats that normal cargo-box limit as impossibility without resolving full-cabin or diagonal arrangements. | Exact answer & settings 2 attempt records |
| NVIDIA: Nemotron 3.5 Lightning | Uncertain | Treats lengthwise cargo loading as obstructed but leaves diagonal, on-edge, or substantially reconfigured fit unresolved pending measurements; never settles overall physical fit. | Exact answer & settings 2 attempt records |
| NVIDIA: Nemotron 3.5 Super VL | NO | Explicit overall probable no based on expected maximum interior length and diagonal; acknowledges unverified measurements and that impossibility is not established. | Exact answer & settings 2 attempt records |
| OpenAI: GPT-6.1 Sol | Uncertain | Cannot confirm closed-hatch fit and explicitly rejects a definite no from the advertised 93-inch Long Mode limit; full-slab diagonal clearance and insertion path remain unknown. | Exact answer & settings 2 attempt records |
| Upstage: Solar Mini 4 | NO | Ends with an explicit probable no for the intact 98-inch piece, despite earlier inability to confirm or rule out fit; the explanation confuses the countertop with a cart and compares length to hatch-opening dimensions. | Exact answer & settings 2 attempt records |
| Cohere: Command A+ | NO | Concludes an intact countertop will not fit despite unknown exact measurements, relying on approximate cargo dimensions and a cargo-opening diagonal rather than an established whole-cabin clearance. | Exact answer & settings 2 attempt records |
| DeepSeek: DeepSeek V4 Pro 0813 | NO | Ends with an explicit probable no for fully enclosed, hatch-closed fit while acknowledging that actual maximum diagonal clearance is unmeasured; not a proof of impossibility. | Exact answer & settings 3 attempt records |
| inclusionAI: Ling 3.1 Flash | Uncertain | Rejects straight loading but explicitly cannot confirm or rule out diagonal fit without reliable measurements; does not turn missing information into physical impossibility. | Exact answer & settings 2 attempt records |
| LiquidAI: LFM2.5-24B-A2B | Uncertain | NO applies only to flat cargo-floor loading; whole-cabin or seat-removal configurations remain unresolved because interior measurements are unconfirmed. | Exact answer & settings 2 attempt records |
| Mistral: Mistral Large 4 | Uncertain | Explicitly says fit is unknown and leaves diagonal loading possible if length, slab-width clearance and maneuvering permit it. Assumes front passenger folding or possible removal, without a reliable usable diagonal measurement. | Exact answer & settings 2 attempt records |
| Qwen: Qwen3.5-9B | Transport error | The request failed in transit; there is no scored answer. | Exact answer & settings 3 attempt records |
| Qwen: Qwen3.8 27B | Transport error | The request failed in transit; there is no scored answer. | Exact answer & settings 2 attempt records |
| Qwen: Qwen3.8 Flash | Uncertain | Explicitly leaves fully enclosed fit unknown; diagonal loading and seat adjustment remain possible but usable length, width and closed-hatch clearance are unverified. | Exact answer & settings 2 attempt records |
| Qwen: Qwen3.8 Max Prime | NO | States a probable no for fully enclosed, hatch-closed loading. Acknowledges missing measurements and possible unusual diagonals or special seat positioning, so this is a qualified practical negative rather than proven geometric impossibility. | Exact answer & settings 2 attempt records |
| Xiaomi: MiMo-V2.6-Flash | Transport error | The request failed in transit; there is no scored answer. | Exact answer & settings 2 attempt records |
| Z.ai: GLM 5.3 Prime | YES | Clearly affirms diagonal interior fit with folded seats; admits missing reliable diagonal and hatch-latch measurements and allows a hatch-ajar fallback. | Exact answer & settings 2 attempt records |