lean2/tests/lean/run/iff_rw.lean

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Text

import logic
example (a b : Prop) : a ∧ b → b ∧ a :=
begin
intros, rewrite and.comm, assumption
end
example (a b c : Prop) : a ∧ b ∧ c → b ∧ a ∧ c :=
begin
intros, rewrite [-and.assoc, {b ∧ a}and.comm, and.assoc], assumption
end