a : ℕ,
x : ℕ := ?m_1
⊢ a = a

a : ℕ
⊢ ℕ
def tst2 : ∀ (a : ℕ), a = a :=
λ (a : ℕ), let x : ℕ := a in eq.refl a
a b : ℕ,
x : ℕ := ?m_1
⊢ a = a

a b : ℕ
⊢ ℕ
-- second goal was indirectly solved by the previous tactic
no goals