New at YANSS: The Texas Sharpshooter Fallacy.
The Misconception: You take randomness into account when determining cause and effect.
The Truth: You tend to ignore random chance when the results seem meaningful or when you want a random event to have a meaningful cause.
The fallacy gets its name from imagining a cowboy shooting at a barn. Over time, the side of the barn becomes riddled with holes. In some places there are lots of them, in others there are few. If the cowboy later paints a bullseye over a spot where his bullet holes clustered together it looks like he is pretty good with a gun.