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Proof step 9 from proof depths-size-one (conclusion)

⊦ # depths(t, i) = 1 ↔ t = Leaf

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ depths(Leaf, i) = i '
Proof step 8:
# depths(t, i) = 1 ⊦ t = Leaf

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ # d ' = 0 +1])]]