10 lines
185 B
Text
10 lines
185 B
Text
prelude
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definition Prop : Type.{1} := Type.{0}
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inductive or (A B : Prop) : Prop :=
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| intro_left : A → or A B
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| intro_right : B → or A B
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check or
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check or.intro_left
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check or.rec
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