factlet - A fact so small it's barely a fact. It's like a fact that's

A fact so small it's barely a fact. It's like a fact that's too little to matter.

I told my friend that a cat has 4 legs. He said that's a factlet. I said it's also a lie.

My teacher said that the number of sides on a square is 4. I said that's a factlet. She said I'm a factoid.

My mom said that the sun is hot. I said that's a factlet. She said it's also a factoid.