The car wash test isn’t a reasoning failure. It’s an operator selection failure.


“Should I walk or drive?” The model reads this as argmax(criterion). Pick the better option on distance, efficiency, environmental impact. Walk wins.
The user meant ∀(requirements). The car has to be at the wash. You have to be at the wash. Both must hold. Drive is the only answer that satisfies the AND.
Surface grammar says OR. Pragmatic structure says AND. The model picks the wrong operator at the framing step, then reasons locally-coherently down the wrong branch.
Every car-wash-class failure has this shape. It’s not that models lack commonsense. They pick disjunction when the problem requires conjunction.
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