Locke
John Locke claimed that the principles of identity and contradiction were general ideas and only occurred to people after considerable abstract, philosophical thought. He characterized the principle of identity as "Whatsoever is, is." The principle of contradiction was stated as "It is impossible for the same thing to be and not to be." To Locke, these were not innate or a priori principles.
Read more about this topic: Law Of Thought
Famous quotes containing the word locke:
“If a child were kept in a place where he never saw any other but black and white till he were a man, he would have no more ideas of scarlet or green, than he that from his childhood never tasted an oyster, or a pineapple, has of those particular relishes.”
—John Locke (1632–1704)
“Whenever the society is dissolved, it is certain the government of that society cannot remain ... that being as impossible, as for the frame of a house to subsist when the materials of it are scattered and dissipated by a whirlwind, or jumbled into a confused heap by an earthquake.”
—John Locke (1632–1704)
“When we know our own strength, we shall the better know what to undertake with hopes of success; and when we have well surveyed the powers of our own minds, and made some estimate what we may expect from them, we shall not be inclined either to sit still, and not set our thoughts on work at all, in despair of knowing anything; nor on the other side, question everything, and declaim all knowledge, because some things are not to be understood.”
—John Locke (1632–1704)