Famous quotes containing the words true and/or propositions:
“This was what you might call a bran-new country; the only roads were of Nature’s making, and the few houses were camps. Here, then, one could no longer accuse institutions and society, but must front the true source of evil.”
—Henry David Thoreau (1817–1862)
“It has often been argued that absolute scepticism is self-contradictory; but this is a mistake: and even if it were not so, it would be no argument against the absolute sceptic, inasmuch as he does not admit that no contradictory propositions are true. Indeed, it would be impossible to move such a man, for his scepticism consists in considering every argument and never deciding upon its validity; he would, therefore, act in this way in reference to the arguments brought against him.”
—Charles Sanders Peirce (1839–1914)