Uberfacts, a Twitter account with 9.43M followers claims that 80% of a child's intelligence is acquired from the mother. How true is this?
Gizmodo doesn't do a very good job of debunking this:
FALSE. This fun fact is a favorite of those who think that intelligence is mostly genetic, and yet don't cite any reliable sources. That 80 percent figure seems to be pulled from thin air, no doubt an incredibly warped version of something that may actually be true.