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,,Was vernünftig ist, das ist wirklich; und was wirklich ist, das ist vernünftig."* This guide is intended for students in philosophy courses; majors, non-majors, and graduate students
![Raphael, 1511, Scuola di Atene](https://commons.wikimedia.org/wiki/File:%22The_School_of_Athens%22_by_Raffaello_Sanzio_da_Urbino.jpg#/media/File:"The_School_of_Athens"_by_Raffaello_Sanzio_da_Urbino.jpg){kind=link}