One of the slides of my physiology 102 course consisted of the claim that women blink twice as much as men. I put that as a fact into Anki. Now it turns out that when I google around it isn't true.

In general the heuristic of believing things I'm told in science university lectures isn't completely bad, but it seems that there a category where lectures want to mention interesting facts and then tell students interesting facts that aren't necessarily true.