10 lines
No EOL
297 B
Text
10 lines
No EOL
297 B
Text
-- Annotating lemmas
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theorem simple (p q r : Bool) : (p → q) ∧ (q → r) → p → r :=
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λ H_pq_qr H_p,
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let P_pq : (p → q) := and::eliml H_pq_qr,
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P_qr : (q → r) := and::elimr H_pq_qr,
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P_q : q := P_pq H_p
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in P_qr P_q
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print environment 1 |