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Proof step 5 from proof dups-fis-keys (previous step)

sk ∈ fis .keys ⊦ sk ∈ fis, dups(fis .keys)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[crewrite-arg: keys-in-01, F, [fis, sk] → [fis, sk]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (fis, sk)]]