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Proof step 2 from proof sgn-true (previous step)

⊦ bits = [], sgn(bits) = true ', false ∈ bits

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ ¬ boolvar ∈ bits ↔ mklist(¬ boolvar, # bits) = bits
Proof step 4:
⊦ bits = [], sgn(bits) = true ', mklist(¬ false, # bits) ≠ bits

Rule argument

seq: ⊦ ¬ boolvar ∈ bits ↔ mklist(¬ boolvar, # bits) = bits subst: [bits, boolvar] → [bits, false] rotate: F spec: bitlista inst: name: mklist-intro

Additional information

Used terms: bits, false