11 lines
240 B
Text
11 lines
240 B
Text
import logic data.prod data.unit
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definition mk_arrow (A : Type) (B : Type) :=
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A → A → B
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inductive confuse (A : Type) :=
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leaf1 : confuse A,
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leaf2 : num → confuse A,
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node : mk_arrow A (confuse A) → confuse A
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check confuse.cases_on
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