Latin roots of the two words: ‘leading from’ and ‘leading in’. Deduction forms the basis of classical LOGIC, while induction is the foundation of SCIENTIFIC METHOD.

Deductive reasoning begins with a general truth/hypothesis and leads to a knowledge of a particular instance of it. The classic form is a SYLLOGISM, in which a necessary conclusion is derived from two accepted premises.


‘If all cows are ruminants, and Bossy is a cow, it follows that Bossy chews her cud.’

Induction begins with the particular and moves to the universal...

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