Some people will never accept that their first impression has to be right, even when it's shaped by people telling you the wrong thing.
Like how people might watch the 1st 30 second of this you-tube video, believe we have invented anti-gravity, and NEVER accept that they didn't get the perspective -- unless they get to see the entire video: Impossible Motion
Nicely done.
[golfclap]
Here's one I like to whip out on them:
Anyone who denies that this faucet is hovering in midair is either a ChiCom stooge or a CIA plant.