Mathematical Proof and Discovery Reductio ad

  • Dale Jacquette
  • Universität Bern
  • Fakultät Für Philosophie
  • Lehrstuhl Für Theoretische Philosophie
Publication date
December 2014

Abstract

Abstract: The uses and interpretation of reductio ad absurdum argument-ation in mathematical proof and dis-covery are examined, illustrated with elementary and progressively sophisti-cated examples, and explained. Against Arthur Schopenhauer’s ob-jections, reductio reasoning is defen-ded as a method of uncovering new mathematical truths, and not merely of confirming independently grasped ma-thematical intuitions. The application of reductio argument is contrasted with purely mechanical brute algo-rithmic inferences as an art requiring skill and intelligent intervention in the choice of hypotheses and attribution of contradictions deduced to a particular assumption in a contradiction’s deri-vation base within a reductio proof structure. Resu...

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