AJC I have been hit with that particular form of rebuttal a time or two what I usually do is ask them to show me in scripture where prevenient grace is taught. Typically the person that brings it up has no clue so it caught upon the horns of a dilemma and thus backs down. The others that do show me some text I take it into consideration but usually find that it is referring to common grace and not prevenient grace. When I point out that they too usually fall silent or go away mad.

Peter

If you believe what you like in the gospels, and reject what you don't like, it is not the gospel you believe, but yourself. Augustine of Hippo