That's not a _____!

That’s not a horse, it’s a donkey.

That’s not a puppet, that’s a doll

That's not a horse it's a cow

that's not district 13, that's section 31 (yep a star trek reference)

thats not ice cream baskin robbins, that's a slime

that's not slug, that's a caterpillar 

that's not worm, that's a finger