You shouldn't keep fact-checking your friends because it's annoying.
Steve's friend was telling a story that Steve didn't trust all that much.
Steve wanted to check the truth of it.
Steve waits until his friend is done talking, excuses himself, then looks it up behind the friend's back.
Steve pulls out his phone in front of his friend and clearly starts googling things his friend is saying.
Steve finds out the truth without hurting anyone, satisfying his curiosity.
His friend gets annoyed and simply stops talking and telling stories to Steve.