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Proof step 2 from proof zeroone (previous step)

0 ≤ i, i ≤ 1 ⊦ i = 0, i = 1

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: le-def: ⊦ i ≤ j ↔ ¬ j < i;%bet-01: ⊦ 0 ≤ i → (i < 1 ↔ i = 0);% ⊦ ¬ i < j → (i = j ↔ ¬ j < i); (ss)