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Seasoned Hedge Fund Manager

I keep on reading about "seasoned" hedge fund managers and "seasoned" traders. Exactly how many years does "seasoned" take?
I think that we're looking at someone who's been in the business for at least 5 years. Like any profession, when are they considered seasoned? After you've survived an industry for 5 years then I'm guessing that you can start calling yourself seasoned.