Really? How is it that you and Mac have escaped this fate?
Get your glasses checked since neither Mac nor I claimed any such thing, I can't speak for Mac but I myself make my best effort to cut through the fog of falsehood and figure out the truth (and no I don't claim 100% success), which is a heck of lot better in my book than falling all over oneself to try to spin, excuse and deflect it away because it's inconvenient to strongly held assumptions.
I do apologize though if such talk makes you uncomfortable, since that is not the intent.
I think a good measure (though not foolproof) is whether or not you have actually changed or altered your positions after presented evidence.
The real mark of the partisan is that they are to close minded to ever actually change a stance they started with. When you are open to new evidence, you are open to change your position on something.
Are we talking about partisans, or ideologues? There's significant difference.