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Noun: direct proof
  1. A way of showing the truth or falsehood of a given statement by a straightforward combination of established facts, usually axioms, existing lemmas and theorems, without making any further assumptions.
    "A proof by contraposition of the implication p -> q is a direct proof of ¬q ->¬p (the contrapositive of p -> q)."

Type of: proof

Encyclopedia: Direct proof

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