Only the ones that matter.

(ABC News) — For Massachusetts Gov. Mitt Romney today responded head-on to critics who say he flip-flops on issues, telling a crowd at a New Hampshire town hall that “it’s not that every single issue I’ve looked at my entire life I’ve never changed my view on.”

While Romney never mentioned chief rival Texas Gov. Rick Perry by name, he certainly seemed to be referencing him in answering a question from a voter asking how to respond to those who question Romney’s candidacy.

Romney at first joked, “Let me give you some brass knuckles, that should help.”

“In the private sector, if you don’t change your view when the facts change, you’ll get fired for being stupid,” Romney added.