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Proof step 3 from proof isobj-isobj-01 (conclusion)

⊦ ¬ is_obj(r, class, st) ∧ st[r -- _type] = typeval(mkclasstype(class)) → ¬ is_obj(r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
st[r -- _type] = typeval(mkclasstype(class)), is_obj(r, st) ⊦ is_obj(r, class, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]