lean2/tests/lean/run/contra1.lean

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open nat
example (a b : nat) (h : false) : a = b :=
by contradiction
example : ∀ (a b : nat), false → a = b :=
by contradiction
example : ∀ (a b : nat), (0:nat) = 1 → a = b :=
by contradiction
example : ∀ (a b : nat), id false → a = b :=
by contradiction
example : ∀ (a b : nat), id ((0:nat) = 1) → a = b :=
by contradiction