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Proof step 4 from proof subset-size (previous step)

# bag0 < # bag, bag ⊆ bag0, ∀ bag1. bag ⊆ bag1 → # bag ≤ # bag1 ⊦

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 3 terms: bag0

Additional information

Used simplifier rules: ⊦ m < n → (n ≤ m ↔ false); (s) Used terms: bag0