The Organon. Aristotle's groundbreaking discovery of logic.

UPDATE:
19:52
What is universal about all apples exists in each of these apples.
That is, if there were no individual apples, the fruit apple would not exist.
Universals exist and can be observed, but do not have an independent existence outside of matter.

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This is a lecture about a chapter of my world history book called:
"In Search of the Sublime - A world history of humanity's relentless pursuit of scientific truth, moral excellence, and enlightenment."
Read the book for FREE at:
worldhistorybook.com

Kind regards,
Stephan P. Dinkgreve
MSc Theoretical Physics
Amsterdam