Q: How many vegans does it take to change an omnivore's mind?
A: Only one. But which vegan will it be?
A: None. The omnivore needs to change it themselves.
A: Fewer than the number it takes to change a Francionist's mind, snort.
A: No idea. But what did you do with the lightbulb?
Yes, I can hear you groaning right through my computer screen! So please salvage sad joke by submitting your own line. ;)