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Proof step 2 from proof ins-twosame (previous step)

⊦ a = b, stng[b, d][a, stng[a]][a0] = stng[b, d][a0]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ a ≠ b → stng[b, d][a] = stng[a]
Proof step 4:
a0 ≠ b ⊦ a = b, stng[b, d][a, stng[a]][a0] = stng[a0]

Rule argument

name: At-other rotate: F subst: [a, d, b, stng] → [a0, d, b, stng]

Additional information

Used simplifier rules: At-other: ⊦ a ≠ b → stng[b, d][a] = stng[a];%At-same: ⊦ stng[a, d][a] = d; Used terms: a0, d, b, stng