In my humble opinion, your question needs a bit more elaboration, as the general definition of polymath is just an individual who possesses knowledge in multiple subjects/areas of knowledge, it begs the question: is it enough just to know about many things to be considered a “polymath”?
I myself wouldn’t consider myself as one, even though I have the following:
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12 years of knowledge in Psychology (self study).
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over 10 years of exercise and nutrition knowledge and experience.
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one of the top 10 Tekken 8 players in my country with multiple tournament wins.
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holding the record for the fastest speedrun in my country in a game called Hades.
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computer science background (dropped out of my final year cause I got bored of it, along with other issues), along with deep interest in modding tech for fun.
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over 15 years of experience in magic, with card magic being the specialization.
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seeing as my body count is 40+, I’d also say I have a good experience in understanding and seducing women.
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lastly, seeing as I’ve been organizing events as my job, I’d say 2.5 years of events organization and management experience.
With all that said, the reason I don’t consider myself a polymath because I lose interest quick, and contrary to Polymaths, the reason for why I’ve invested time in so many things is because I get bored easily and just get addicted to trying new experiences, up until I repeat the cycle.
In a way, I’m the opposite of a Polymath; just a guy with an addictive personality and a lot of free time 