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Proof step 2 from proof py-px (previous step)

py(user, p, st) ⊦ px(user, p, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
⊦ py(user, p, st) ↔ pw(user, p, st) ∧ px(user, p, st)

Rule argument

Additional information

Used simplifier rules: py: ⊦ py(user, p, st) ↔ pw(user, p, st) ∧ px(user, p, st);