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Not even joking. Get off your high horse. Saylor is a great source of info. Especially for beginners. What an absolute clown you are.
You have no idea what are you talking about. If you cannot make the difference between "good source" and propaganda, then you will never learn.
Good source of info is:
THAT'S ALL. All the rest with Saylor and others is garbage, material that should not be presented to noobs.