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def definition def or abbrev

Counterfactual

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 364def Counterfactual (c : Config) : Set Config :=

proof body

Definition body.

 365  {y : Config | y ∈ Possibility c ∧ y ≠ Actualize c ∧ J y.value > J (Actualize c).value}
 366
 367/-! ## Possibility Space -/
 368
 369/-- **POSSIBILITY SPACE**: The set of all reachable configurations from a given config.
 370
 371    This is the transitive closure of the Possibility relation. -/

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