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 but when he gave utterance to some opinion or feeling repugnant to mine, in a manner which would have made it disingenuousness on my part to remain silent.

It remains to speak of what I wrote during these years, which, independently of my contributions to newspapers, was considerable. In 1830 and 1831 I wrote the five Essays since published under the title of “Essays on some Unsettled Questions of Political Economy,” almost as they now stand, except that in 1833 I partially rewrote the fifth Essay. They were written with no immediate purpose of publication; and when, some years later, I offered them to a publisher, he declined them. They were only printed in 1844, after the success of the “System of Logic.” I also resumed my speculations on this last subject, and puzzled myself, like others before me, with the great paradox of the discovery of new truths by general reasoning. As to the fact, there could be no doubt. As little could it be doubted, that all reasoning is resolvable into syllogisms, and that in every syllogism the conclusion is actually contained and implied in the premises. How, being so contained and implied, it could be new truth, and how the theorems of geometry, so different in appearance from the definitions and axioms, could be all contained in these, was a difficulty which no one, I thought, had sufficiently felt, and which, at all events, no one had succeeded in clearing up. The