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5035 | The two basics of reasoning are contradiction and sufficient reason [Leibniz] |
Full Idea: The two first principles of reasoning are: the principle of contradiction, and the principle of the need for giving a reason. | |
From: Gottfried Leibniz (A Specimen of Discoveries [1686], p.75) | |
A reaction: Could animals have any reasoning ability (say, in solving a physical problem)? Leibniz's criteria both require language. Note the overlapping of the principle of sufficient reason (there IS a reason) with the contractual idea of GIVING reasons. |