Principles of psychology

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Page 26 - ANY two sides of a triangle are together greater than the third side.
Page 347 - Propositions of this kind are discoverable by the mere operation of thought, without dependence on what is anywhere existent in the universe.
Page 60 - All men are mortal, Socrates is a man, therefore Socrates is mortal, the subject and predicate of the major premise are connotative terms, denoting objects and connoting attributes.
Page 348 - When we entertain, therefore, any suspicion that a philosophical term is employed without any meaning or idea (as is but too frequent), we need but enquire, from what impression is that supposed idea derived? And if it be impossible to assign any, this will serve to confirm our suspicion.
Page 342 - The contrary of every matter of fact is still possible; because it can never imply a contradiction, and is conceived by the mind with the same facility and distinctness, as if ever so conformable to reality. That the sun will not rise to-morrow is no less intelligible a proposition, and implies no more contradiction than the affirmation, that it will rise.
Page 404 - Accordingly, no geometrical proposition, as, for instance, that any two sides of a triangle are greater than the third side, can ever be derived from the general conceptions of line and triangle, but only from perception.
Page 329 - By the term impression, then, I mean all our more lively perceptions, when we hear, or see, or feel, or love, or hate, or desire, or will. And impressions are distinguished from ideas, which are the less lively perceptions, of which we are conscious, when we reflect on any of those sensations or movements above mentioned.
Page 338 - Nor consequently of the greatest heat perceived by sense, since you acknowledge this to be no small pain?
Page 46 - The greater side of every triangle has the greater angle opposite to it," is quoted in the proof of a subsequent theorem, the act of thought implied is of the kind above symbolized. The greater side (A) of a triangle, has been found to stand in a special relation of coexistence with the greater angle...
Page 21 - The angles at the base of an isosceles triangle are equal to each other ; and if the equal sides be produced, the angles on the other side of the base shall be equal.

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