A Logic of Facts; Or, Every-day Reasoning

Induction is an inference from many facts. Induction is verification. Just as in a syllogism we show that a part is contained in the whole, so in induction we show that a part i...

As clear fountains send forth pellucid streams, so do clear truths give accurate sciences. The more definite the facts, the more perfect the science; it is therefore of importan...

Observation** of nature is the only source of truth. Discursive observation is the art of noticing circumstances evident to the senses. Men who do this intentionally and careful...

It is a humiliating reflection that mankind never reasoned so ill as when they most professed to cultivate the art of reasoning.--Life of Galileo, p. 1. society for the Diffusio...

Reasoning is a simple business. To reason is to state facts in support of a proposition. A conclusive fact so advanced is called a reason. All the reasons offered in proof of a...

Freedom has been hunted through the world, and is ever exposed to Insult and injury. It is crushed by conquest; frowned from courts; expelled from colleges; scorned out of socie...

As every proposition consists of two names, and as every proposition affirms or denies one of these names of the other, the value of definition, which fixes the import of names,...

Man has been called the plaything of chance, but there is no logic more close and inflexible than that of human life: all is entwined together; and for him who is able to disent...

To have reached, in the study of observed phenomena, the point of perception indicated in this motto, and to feel the full force of the remark, is to have imbibed the spirit of...

WE hope to be able to save students from the fate of Diodorus, (a great logician, who died in his school through shame at being, unable to resolve a quibble propounded by Stilno...

2. Prosperity could never be reached and maintained in this country, without some provision for the regular employment of the poor.--Mr. Beckett's Speech in the House of Commons...

Necessary Truths--are those in which we not only learn that the proposition is true, but see that it must be true; in which the negative of the truth is not only false, but impo...

All men know something of truth. Happily it is the first impulse of childhood, and nature teaches us its pleasure before reason instructs us in its truth. In infancy we own its...

The term Idol is employed by Bacon to designate those prejudices which men prefer to truth. A prejudice is a bias without a reason for it, an opinion without a foundation, a jud...

In accordance with that experience which directs to the profoundest books for the simplest statements, we turn to Mill's Logic for the philosophy of propositions. The answer to...

Logic is a general guide to the discovery of truth, and teaches us its systematic communication to others. This definition is intended to combine logic and rhetoric into one sys...