 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 negation of the truth is not only false, but impossible; in which we cannot, even by an effort of imagination, or in a supposition,...  An introduction to mental philosophy - Page 21by sir George Ramsay (9th bart.) - 1853Full view - About this book
 | Robert Blakey - Philosophy - 1830 - 420 pages
...we not only learn that the proposition if true, but see that it must he true ; in which the negation is not only false but impossible ; in which we cannot even by an effort of the imagination, or in a supposition, conceive the reverse of that which is asserted. That there are... | |
 | John Stuart Mill - Knowledge, Theory of - 1846 - 624 pages
...distinction is, the non-recognition of which incurs this denunciation, let us refer again to Mr. Whewell. " Necessary truths are those in which we not only learn that the proposition ia true, but see that it must be true ; in which the negation of the truth is not only false, but impossible;... | |
 | William Whewell - Induction (Logic) - 1847 - 754 pages
...we not only learn that the proposition is true, but see that it must be true ; in which the negation of the truth is not only false, but impossible; in...supposition, conceive the reverse of that which is asserted. 3. That there are such truths cannot be doubted. We may take, for example, all relations of number.... | |
 | William Whewell - Science - 1847 - 756 pages
...shall begin by considering Necessary Truths more fully than I have yet done. As I have already said, necessary truths are those in which we not only learn...true, but see that it must be true ; in which the negation of the truth is not only false, but impossible; in which we cannot, even by an effort of imagination,... | |
 | Robert Blakey - Cognitive science - 1848 - 696 pages
...us return to the consideration of necessary and contingent truths. " Necessary truths," says he, " are those in which we not only learn that the proposition...true, but see that it must be true ; in which the negation is not only false but impossible ; in which we cannot even by an effort of the imagination,... | |
 | John Stuart Mill - Knowledge, Theory of - 1850 - 616 pages
...we not only learn that the proposition it true, but see that it must be true ; in which the negation of the truth is not only false, but impossible ; in...effort of imagination, or in a supposition, conceive tKe reverse of that which is asserted. That there are such truths cannot be doubted. We may take, for... | |
 | Frances Power Cobbe - 1855 - 228 pages
...we not only learn that the proposition i> true, but see that it must be true; in which the negation is not only false, but impossible; in which we cannot, even by an effort of the imagination, or in a supposition, conceive the reverse of that which is asserted. That there are... | |
 | George Henry Lewes - Philosophy - 1857 - 838 pages
...wavering, does the idea of their meeting become possible. " Necessary truths," says Dr. Whewell, " are those in which we not only learn that the proposition...true, but see that it must be true ; in which the negation is not only false, but impossible ; in which we cannot, even by an effort of the. imagination,... | |
 | John Stuart Mill - Knowledge, Theory of - 1858 - 666 pages
...distinction is, the non-recognition of which incurs this denunciation, let us refer again to Mr. Whewell. " Necessary truths are those in which we not only learn that the proposition it true, but see that it must be true ; in which the negation of the truth is not only false, but impossible... | |
 | Frances Power Cobbe - Ethics - 1859 - 308 pages
...not be unacceptable. "Necessary truths," says Whewell (quoted by Lewes, Hist. of Phil., IV. p. 123), "are those in which we not only learn that the proposition...is true, but see that it must be true; in which the negation is not only false, but impossible ; in which we cannot, even by an effort of the imagination,... | |
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