Your comments are very confusing and indeed serve to denounce your view point. According to what you implied above, anyone that cannot prove whatever it is that they accept as reality is guilty of "belief" or believing. Belief or believing is NOT faith nor is it something that someone participates in philosophically. One cannot be "guilty" of, nor "choose" to exercise belief. Belief is merely the acceptance of ANYTHING that you consider reality. Whether you can prove that reality or not. You cannot escape belief. It's impossible. If you rationally accept anything as reality, you believe it. If you do not accept something, you have no choice but to reject it. Belief is the rational association that we make with anything that we consider reality. Atheism is a belief, just as evolution is a belief, just as Christianity is a belief. All three of these things have very different meanings and representations, but because all three require distinct processes to cognitively consider, they are beliefs. Here is the tricky part that is outside the a-typical box of most people's considerations. ANYTIME that we attempt to prove or disprove anything, that thing must be premised by a belief. It is through the concept of proof that we can best view and illuminate the indispensable value of belief. Before and after the fact. If we know that something can be proven, we immediately recognize that it is because of belief that we have proved it's reality. If we know that something cannot be proved, it is because we are convicted to believe that it cannot be proved. Belief is a connection whereby the potential cogency of everyone's reality is self determined.
No, you are confusing yourself. Much of what you say I said, I did not say.
Evolution is not a belief. Evolution is a theory which may be partly true, completely true or completely false. Some people believe it & some don't. Perhaps mistakes are made in testing the theory & putting the facts together. It's currently accepted by most scientists. That may or may not change. All too human scientists yet do a much better job of figuring things out than all too human faith believers.
If we assume something in order to test it, that's not actually assuming it for a fact. It's conditional upon the results of that test & succeeding tests.
It's not the least bit tricky.