The danger of mixing up causality and correlation: Ionica Smeets

"Before you can conclude that one thing causes something else, you need to know why and how."

We are constantly presented with studies and news stories asserting things like, “night lights cause shortsightedness” or “married men live longer.” But before we take these conclusions to heart, says Ionica Smeets, we should examine whether the connections we see are causational or are merely coincidental. (Filmed at TEDxDelft.)

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