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Proof step 5 from proof ac-no2 (conclusion)

⊦ is_indexkey(fv .1) → addclass(class, fv ' + fis, st) = addclass(class, fis, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
is_indexkey(fv .1) ⊦ addclass(class, fv ' + fis, st) = addclass(class, fis, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]