If we're talking about X, you argue A, I counter with B, and instead of counter-arguing you just jump to a different point or framing, you just don't want to admit that your premise didn't hold much weight to begin with. "I want a system that rewards hard work" "This system doesn't reward hard work" "Whatever, I want risk-taking people to be rewarded" You aren't so much arguing as you're rationalizing your position, rather than sincerely taking a look at your own argument when it's challenged.