Overfitting is insidious. These graphics would convince a lot of people who'd otherwise catch the error in the article without needing it to be explained to the

Overfitting is insidious. These graphics would convince a lot of people who'd otherwise catch the error in the article without needing it to be explained to them. At that point it's not enough to eyeball the line of best fit, you have to sanity check the explanatory power and do cross validation...