If “B” requires premise “A”, then “B” can not explain “A”. Also known as the circular argument, though I like this explanation by Feser better. This is a common fallacy that the heathens use, but you’ll find it on the Left also.
Another big one is the false dichotomy or the false binary, which permeates Leftist arguments. For example, you can either have the bloated, fascist American “free market” medical system, or the communist single payer system. No, I’ll take the real free market system with minimal government interference. You know, the system of over 50 years ago where the doctor CAME TO YOUR HOUSE with his black doctor’s bag, and you paid him with cash from your pocket.