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a posteriorisee A PRIORI AND A POSTERIORI.
knowledge acquired through experience. This method of acquiring knowledge was already being examined in antiquity by Aristotle, Plato, and Boethius and in the Middle Ages by Averroës (ibn Rushd), Avicenna (ibn Sina), Albert von Bollstädt, Thomas Aquinas, and others. The analysis of cognition a posteriori occupied an important place in the system of I. Kant, who proposed that the special laws of science can be recognized only a posteriori but that the general principles of cognition are independent of any experience—that is, a priori.