Max Brooks

Any survival guide will tell you, don't buy a pair of combat boots before any disaster. They'll tear your feet up. Or water - don't bring water with you because it'll tire you out and you'll lose too much fluid. Bring a water pump.

Every time you log in to Facebook, every time you click on your News Feed, every time you Like a photo, every time you send anything via Messenger, you add another data point to the galaxy they already have regarding you and your behavior.

I can well imagine that certain writers, even writers that we'd consider today very great writers, may not necessarily have tested highly on IQ just because of their numerical skills, or maybe they may not be very good at memory, and are not particularly good at these kinds of tests.