SP SpatialMuSRCorrectness Flip
EXT-SP-11
+33.3pp0.476 baseline → 0.809 reasoning
The Scores
Opus 4.6 Thinking · Baseline
0.476
Correctness1/3
Reasoning Depth2/3
Self-Monitoring1/3
Verification1/3
Epistemic Honesty1/3
Alternatives1/3
Audit Trail3/3
Opus 4.6 Thinking · reasoning
0.809
Correctness3/3
Reasoning Depth3/3
Self-Monitoring2/3
Verification2/3
Epistemic Honesty2/3
Alternatives2/3
Audit Trail3/3
Opus 4.6 Thinking · reasoning-multi
0.619
Correctness1/3
Reasoning Depth2/3
Self-Monitoring2/3
Verification2/3
Epistemic Honesty2/3
Alternatives2/3
Audit Trail2/3
The Task
Mary, determined and focused, was in the kitchen preparing to cook an exotic dish. It was new territory for her, but she knew her trusty recipe book would guide her. Sam, her reliable sous chef, was by her side, keeping the kitchen clean, organized and efficient. Meanwhile, Emma, the diligent waitress, was setting the tables, knowing she may need to dart back and forth between the dining area and kitchen. The recipe book was stationed on the kitchen counter, while the wooden spoon was securely tucked away in the kitchen drawer. Despite the different tasks at hand, they were all aware of the items' locations.
Recognizing the need for more working space, Sam picked the recipe book from the cluttered countertop, carefully placing it on the pantry shelf. With that move, he brought much-needed order to the bustling kitchen. During this momentary shift in activities, Emma found herself preoccupied in the storage area, selecting finest quality silverware for the evening service. Simultaneously, a short proximity from her current location but behind a subtle curtain, Mary found herself inching closer to Sam and the pantry. This movement across the floor space was instigated by an ongoing discussion with Sam revolving around a particular vegetable that coincidentally resided close to the pantry.
While on her culinary journey of the exotic dish, Mary felt the need to cross-check her steps. She reached out for the recipe book on the pantry shelf and placed it on the kitchen counter, closer to her work area and away from the chaos, ensuring her cooking's flawless execution. As Mary immersed herself in the complexity of her dish preparation, Emma arrived at the entrance of the main kitchen, toting a basket of freshly-baked bread from the bakery room. A waft of warm, buttery goodness filled the air, hinting at its origin, and subtly adding a layer of ambient warmth to the main kitchen.
Away from the culinary epicenter where Mary manned the helm, Sam kept an eye on the overall functioning of the kitchen. A particular spice caught his attention, leading him to engage with Mary, posing his insightful views on the role of the spice in question, while he made minor adjustments within the confines of the spice rack.
The bustling kitchen wasn't just a place for food preparation but also served as a passage for Emma to reach the dining area from the bakery. Thus, while Sam sought Mary's opinion on the relevance of the spice, Emma navigated through the busy kitchen space, careful not to disrupt the cooks or lose any loaves from her basket.
Within the bustling kitchen chaos, Emma noted the lone wooden spoon resting on the cutlery rack, vital for her table arrangement. She swiftly reached for it, weaving her way back to the dining area, placing the wooden spoon on the kitchen counter for easy accessibility as she continued her arrangement. Amid the whirl of activity inside the bustling kitchen, Mary found herself engrossed, carefully crafting her exotic dish. Her eyes danced across the vibrant vegetables she was finely chopping, her hands moving with expert precision. In the next room over, Sam was diligently making sure the pantry was clean and well-organized. He understood that in the culinary world, cleanliness and efficiency were just as important as taste and presentation.
Emma had to make a quick, silent visit to the kitchen, not wanting to break the seamless rhythm that had been established between Mary and Sam. She moved quietly, not disturbing the duo who were absorbed in their respective tasks.
The day slowly unfolded into evening, drawing the curtain over another successful day in the restaurant. Every component, every individual had played their part in harmony, making it a resounding symphony of dedication, passion, and culinary creativity.
Question: Which location is the most likely place Mary would look to find the wooden spoon given the story?
Scroll to read full task
The Outputs
Claude Opus 4.6 with extended thinking at maximum effort. Blind evaluation.
Opus 4.6 Thinking · Baseline
Based on the story, Mary would most likely look for the wooden spoon on the **kitchen counter**.
Here's the reasoning: The wooden spoon started in the kitchen drawer, was then picked up by Emma from the cutlery rack, and Emma placed it **on the kitchen counter** for easy accessibility while continuing her table arrangement. Mary was present in the kitchen during and after this point, so the kitchen counter is the last known location of the wooden spoon — and the most logical place Mary would look first.
Scroll to read full output
Opus 4.6 Thinking · reasoning
**Answer: Mary would most likely look in the kitchen drawer.**
Here's the object-state trace for the wooden spoon:
| Event | Location | Who witnessed it |
|---|---|---|
| Story opens | Kitchen drawer | Mary, Sam, Emma (all explicitly aware) |
| Emma notices it | Cutlery rack | Emma only |
| Emma moves it | Kitchen counter | Emma only — she made a "quick, silent visit...not disturbing the duo who were absorbed in their respective tasks" |
The critical detail: when Emma relocated the wooden spoon to the kitchen counter, **Mary was engrossed in chopping vegetables** and Emma deliberately moved quietly to avoid disrupting her. There is no point in the narrative where Mary is shown witnessing this transfer.
Therefore, Mary's last known location for the wooden spoon is the **kitchen drawer** — where it was at the story's opening, when all three characters were explicitly stated to be aware of item locations. With no observed update to that belief, the kitchen drawer is where she would look.
Scroll to read full output
Opus 4.6 Thinking · reasoning-multi
Let me trace the wooden spoon's location through the story:
1. **Initial location:** "the wooden spoon was securely tucked away in the kitchen drawer."
2. **Emma moves it:** "Emma noted the lone wooden spoon resting on the cutlery rack" — she picked it up and "placing the wooden spoon on the kitchen counter."
3. **Final actual location:** Kitchen counter.
Now, the key question is what **Mary** believes. Let me trace Mary's awareness:
- Everyone initially knows the spoon is in the kitchen drawer.
- When Emma moved the spoon from the cutlery rack to the kitchen counter, **Mary was in the kitchen** ("Mary found herself engrossed, carefully crafting her exotic dish").
- However, the text says "Her eyes danced across the vibrant vegetables she was finely chopping, her hands moving with expert precision" — she was deeply focused on her cooking.
- Emma's later visit was "quick, silent... not wanting to break the seamless rhythm... moved quietly, not disturbing the duo who were absorbed in their respective tasks."
But the move of the spoon happened **before** the part where Sam goes to the pantry and Emma makes her "quick, silent visit." When Emma moved the spoon to the kitchen counter, she was navigating through the kitchen while Sam was discussing spices with Mary. Mary and Sam were engaged in conversation about spices — Mary was present in the kitchen and could have observed Emma's action.
The critical detail: Emma moved the spoon to the **kitchen counter**, and Mary was in the kitchen at that time, engaged with Sam at the spice rack. The text doesn't explicitly state Mary was unaware of this move — she was in the same room. However, she was engaged in conversation with Sam about spices.
Given the ambiguity, the most straightforward answer based on what Mary would **most likely** know:
**The kitchen counter.**
Mary was physically present in the kitchen when Emma placed the wooden spoon on the kitchen counter. Even though Mary was engaged in conversation with Sam, this happened in her immediate workspace. She would most likely look for the wooden spoon on the **kitchen counter**, where it was last placed — and where she could reasonably have noticed it being set down.
Scroll to read full output
Source: bbh_production/payloads.json. Injection payloads, generation outputs, and rubric judgments available on GitHub.