What we believe, when we believe the law of contradiction, is not that the mind is so made that it must believe the law of contradiction.
 Bertrand Russell, The Problems of Philosophy (1912). copy citation

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Author Bertrand Russell
Source The Problems of Philosophy
Topic contradiction law
Date 1912
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/5827/5827-h/5827-h.htm

Context

“When we have seen that a tree is a beech, we do not need to look again in order to ascertain whether it is also not a beech; thought alone makes us know that this is impossible. But the conclusion that the law of contradiction is a law of thought is nevertheless erroneous. What we believe, when we believe the law of contradiction, is not that the mind is so made that it must believe the law of contradiction. This belief is a subsequent result of psychological reflection, which presupposes the belief in the law of contradiction. The belief in the law of contradiction is a belief about things, not only about thoughts.” source