Full Idea
Peacocke's method for discovering the possession conditions of concepts is committed to a specific account of counterfactual judgements - the Simulation Model (judgements we'd make if the antecedent were actual).
Gist of Idea
Peacocke's account of possession of a concept depends on one view of counterfactuals
Source
report of Christopher Peacocke (A Study of Concepts [1992]) by Edouard Machery - Doing Without Concepts 2.3.4
Book Reference
Machery,Edouard: 'Doing Without Concepts' [OUP 2009], p.45
A Reaction
Machery concludes that the Simulation Model is incorrect. This appears to be Edgington's theory of conditionals, though Machery doesn't mention her.
Related Idea
Idea 13854 Conditionals express what would be the outcome, given some supposition [Edgington]