PIERRE JACOB - L’énigme développementale du syllogisme disjonctif

The talk provides a comprehensive and nuanced overview of the developmental research on disjunctive syllogism. Jacob successfully integrates philosophical arguments (Fodor, Chomsky, Davidson) with empirical studies (Carey, Redshaw & Sudendorf, Engelmann et al.) to highlight the complexity of the issue. He is careful to point out methodological concerns, such as the potential confounds in the Y-tube task and the importance of ecological validity in comparative studies. The argumentation is solid, and he does not oversimplify the contradictory findings; instead, he proposes a plausible reconciliation based on the idea of minimal representations. However, the talk is primarily an expert opinion rather than a systematic review, and some claims could benefit from more explicit citations. The discussion of the tube-in-Y task is detailed, but the verbal tasks are only briefly mentioned. The speaker’s expertise is evident, and the content is scientifically rigorous, though it assumes some familiarity with cognitive science concepts. The title accurately reflects the content, and the talk is well-structured. Overall, it is a valuable resource for those interested in cognitive development and logical reasoning.

The title accurately reflects the content: the talk focuses on the developmental puzzle of disjunctive syllogism, discussing experimental evidence and theoretical interpretations.

8/10

The speaker is a recognized researcher in cognitive science, presenting a well-structured talk referencing key studies (Carey, Redshaw & Sudendorf, Engelmann et al., etc.) and philosophical debates (Fodor, Chomsky, Piaget). The content is consistent with current literature, though the talk is an opinion/expert synthesis rather than a peer-reviewed meta-analysis.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 02:00Introduction to the disjunctive syllogism and its formal representation.
• 05:00Explanation of the Y-tube task and its use to test representation of possibilities.
• 10:00Discussion of nativist vs. constructivist approaches, referencing Fodor and Carey.
• 15:00Presentation of Redshaw and Sudendorf's findings on children's performance in the Y-tube task.
• 20:00Comparison with non-human primate studies, including Engelmann et al. (2023) competitive paradigm.
• 25:00Review of verbal tasks for disjunctive syllogism in children.
• 30:00Proposal of a reconciliation: minimal representation of possibilities in young children.
• 35:00Conclusion and implications for understanding logical reasoning development.

• Cognivence — Organisation of the Forum des Sciences Cognitives where the talk was given.

• Redshaw, J., & Sudendorf, T. (2016). Foresight beyond the very young. Cognition. — The Y-tube task study showing that children under 4 fail to use both hands, suggesting a lack of representation of mutually exclusive possibilities.

• Engelmann, J. M., et al. (2023). Competitive context reveals chimpanzees' ability to represent possibilities. — This study shows that chimpanzees can use both hands in a competitive Y-tube task, contradicting the earlier conclusion that they lack the ability to represent possibilities.