My argument against creationists goes like this:

So what you’re telling me then, is that all of the physical evidence that exists that the earth is older than that is fake, that the earth was created ‘with age’?

(they say yes)

Okay, so you’re saying that God, the all mighty God that loves us is LYING to us, that he faked everything! Sorry, but I love God too much to believe he’s a lying, cheating, con artist like you want me to believe.

(and yes, I have used this on a family member who to this day has not ever responded to it. And it just points out how STUPID this whole argument is.)