How does the content of this article justify the straight-up factual assertion in the headline? This is just a thing about some guy speculating about some stuff. The headline implies a conclusive clinical trial result. HNers should know better than to upvote this kind of shit.

EDIT: I wrote the above when the title was "Gym workouts and sunbathing do more for your brain than crosswords and Mozart" and the link was to a different URL.