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Proof step 3 from proof RED-iff-reduce (previous step)

〈RED(t; t0)〉 t0 = t', ¬ t =>* t' ∨ ¬ irred(t') ⊦

User applied rule insert lemma

And obtained the following new goals

Proof step 1:
〈RED(t; t')〉 t' = t1 ⊦ t =>* t1 ∧ irred(t1)
Proof step 2:
〈RED(t; t0)〉 t0 = t', ¬ t =>* t' ∨ ¬ irred(t') ⊦ 〈RED(t; t'0)〉 t'0 = t'

Rule argument

[x0lemmaarg: spec-name: instance-name: lemma-name: RED-correct antecedent: 〈RED(t; t')〉 t' = t1 succedent: t =>* t1 ∧ irred(t1) substlist: [t, t1] → [t, t'] add preconditions?: F is rewrite lemma?: F current spec?: T rotate lemma?: F replace all?: F paths: () dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (t, t')]]