I could say that because God has infinite foreknowledge that every time a person submits to the grace of God that it is, in fact, irresistible grace, because he could not have done otherwise. That would not negate the fact that the person made the decision freely and without "compulsion" from God but merely because God calls and the person believes and follows --- "an effectual calling" if you will. It is technically an irresistible act of surrender because God knows that the person will surrender when he calls. As long as God knows something will happen, it cannot not happen.
So is there such a thing as "irresitible grace" and salvation by "effectual calling?" Yes. Do you have to be a Calvinist to believe it? No. It is quite compatible with Arminianism and other non-Calvinist theologies.
Marlowe, you are beginning to sound like Xzins.
You redefine the term irresistable grace. We are wasting time with this.