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A young child knows A is bigger than B and B is bigger than C, but not that A is bigger than C. She lacks:

AObject permanence
BSymbolic function
CHypothetical reasoning
DTransitive inference
Answer & Solution
Correct answer: D. Transitive inference
1. The child is given two relations: A > B and B > C. 2. Combining them logically gives A > C. 3. Using known relations to work out a missing one is **transitive inference**. 4. Preoperational children lack this logic; it develops in the concrete operational stage. 5. So the missing skill is transitive inference. **Why not the others:** Hypothetical reasoning concerns what-if ideas in formal operations, which is more than this concrete task needs. _Source: Wikipedia, "Piaget's theory of cognitive development", section "Intuitive thought substage" (revision 1379038101)_
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