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Proof step 12 from proof validFields-fis (conclusion)

⊦ r -- fv .1 ∈ st ∧ fv .1 ≠ _type ∧ fv .1 ≠ _length ∧ ¬ fv .1 ∈ fis → (validFields(r, fis + fv ', st) ↔ validFields(r, fis, st))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
r -- fv .1 ∈ st, r ∈ st ⊦ validFields(r, fis + fv ', st) ↔ validFields(r, fis, st), fv .1 = _length, fv .1 = _type, fv .1 ∈ fis

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])]]