PLAY. Introduction to Proof Assignment and Quiz Flashcards | Quizlet Level. Question: What Is The Main Reason Why Must Descartes Prove That There Is No Evil Genius (God)tricking Him? Start studying proof reasons. Search. Print Math vocab flashcards and study them anytime, anywhere. Click here to study/print these flashcards. Users Options. Inductive Reasoning . if two angles form a right angle, then they are complementary, If two angles form a linear pair, then they are supplementary, If