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Proof step 10 from proof lead-is-odd (previous step)

even(lead(n)), ∀ n0. n0 < n → (true → odd(lead(n0))) ⊦

User applied rule cut formula

And obtained the following new goals

Proof step 3:
even(n), even(lead(n)), ∀ n0. n0 < n → (true → odd(lead(n0))) ⊦
Proof step 9:
even(lead(n)), ∀ n0. n0 < n → (true → odd(lead(n0))) ⊦ even(n)

Rule argument

[fma-arg: even(n)]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (even(n))]]