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Proof step 46 from proof bib-on-bits (previous step)

8 ≤ # int2bits(i) ⊦ b2i(i2b(bits2int(lastn(8, int2bits(i))))) = bits2int(lastn(8, int2bits(i))), ¬ i < ~128 ∧ ¬ 127 < i, ¬ bits2int(lastn(8, int2bits(i))) < ~128 ∧ ¬ 127 < bits2int(lastn(8, int2bits(i)))

User applied rule case distinction

And obtained the following new goals

Rule argument

pos: right 3

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