fact me! - The final punch you throw to prove you're right and your opp

The final punch you throw to prove you're right and your opponent is a total idiot.

'Fact me! You're still using a landline. I've had a smartphone since 2012.'

'Fact me! You said you'd win the contest. You didn't even show up.'

'Fact me! You said you'd be on time. You're still late.'