What you're running into, at that point, is a case of sloppy definitions - the same way that "theory" in common usage means "hypothesis, not theory" in technical usage, you're hitting a point of conflating "knowledge", "belief", and "faith" into a single word.

You really need to set down what these words *mean*, and get THAT agreed on, before you can argue with them.

(I suggest: "Belief: An assertion of a positive statement as fact" and "Faith: Belief without evidence, or belief contrary to evidence")