Deduction is certain and infallible, in the sense that each step in deductive reasoning will lead us to some result, as certain as the law itself. But it does not follow that deduction will lead the reasoner to every result of a law or combination of laws.


The Principles of Science: A Treatise on Logic and Scientific Method - Book IV, Chapter XXIV (p. 534), Macmillan & Company Ltd. 1887

William Stanley Jevons Quotes

Deduction is certain and infallible, in the sense that each step in deductive reasoning will lead us to some result, as certain as the law itself....

Deduction is certain and infallible, in the sense that each step in deductive reasoning will lead us to some result, as certain as the law itself....

Deduction is certain and infallible, in the sense that each step in deductive reasoning will lead us to some result, as certain as the law itself....

Deduction is certain and infallible, in the sense that each step in deductive reasoning will lead us to some result, as certain as the law itself....