I know something

Phrase originated by my best friend. When you don't know much, at least you know something. It's either self-derogatory, or exclamatory.

On answering the Double Jeopardy question correctly:
i know something!

On being lengthily and rigorously corrected on an item in your area of specialty:
well, i know something.

Not true. Very not true. What do you know? I mean, what is unquestionably true? Math? Basic arithmetic is unprovable, and all other math is based on the assumptions made in arithmetic. Logic? another bunch of assumptions. You assume that if a then b; a. Therefore b. You can't prove that because it's one of the base assumption. There's nothing below it to use to prove it. God? Let's not go there.
It's impossible to prove anything false. It's even harder to prove it true.

But, I don't know this for sure.

"There are no facts, only interpretations." -- Friedrich Nietzsche

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FatAlbertTheta: I, too, like the definition of "know" being simply that you don't doubt it, but the strict definition is somethign you're certain of that is true. Either way, knowledge is possible, but unreasonable, IMO.

You can know things that aren't true. Knowing something does not explicitly imply that those things are true or false or anything in between. If he had said, "I know some things that are proveably true", then that's kind of questionable depending on what assumptions you have to begin with.

The act of knowing and the idea of knowledge does not forceably imply truth. Knowledge is formed of all kinds of things from opinions to facts to history to math to experience. Very little of that is mathematically proveably true.

So the statement "I know something" is absolutely true. The statement itself is a piece of knowledge and having one piece is something.