lean2/tests/lean/run/is_true.lean

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import data.nat
open nat
example : is_true (2 = 2) := trivial
example : is_false (3 = 2) := trivial
example : is_true (2 < 3) := trivial
example : is_true (3 | 9) := trivial
example : is_false (3 | 7) := trivial