This thread, tho
https://twitter.com/Meaningness/status/1122551950522716161 …
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As far as I can tell, if "number of panic attacks" and "duration of general malaise" are decent indicators, getting into grad school and getting a book deal are two of the worst things that can happen to People Who Are Not David Deutsch. 
I only accept graduate students who already want to do the type of research we do in my lab. And the best predictor of that is that they started doing such research even before they applied to work with me. As far as I can tell, I have a pretty happy lab.
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