O Zasadzie Sprzeczności u Arystotelesa

The work \"O Zasadzie Sprzeczności u Arystotelesa\" by Jan Łukasiewicz examines Aristotle's principle of contradiction. This principle, also known as the law of contradiction, is a fundamental law of logic. It states that a thing cannot simultaneously be and not be of a specified kind or in a specified manner. For example, a table cannot be both a table and not a table at the same time. This principle is one of the traditional laws of thought, alongside the law of excluded middle and the principle of identity. Łukasiewicz formulated a propositional calculus where this law, along with the law of excluded middle, did not hold for future contingent events.123