I think you make too little of what I (and other Christians) consider reasonable. If I, to the best of my abilities, examine science, philosophy, theology, and my experiences, and from these reason that the correct conclusion is that God created all I may observe and consider, including human personhood (soul), than I cannot accept your inference that I have come to an unsound or questionable position.
Thus the constant (and at time somewhat odd) assertion from atheists for your version of evidence has a hollow ring to me.
I can understand where an atheist comes from, generally speaking. If we were to discuss the Christian faith, and that of repentance, we can generally see all of us starting as atheists, Christians have discussed this notion of absence of faith, separated from God by sin, for centuries. So I can readily see why you would argue from the point of sense based phenomena and a materialistic outlook - we believe that until God acts, by His Grace, we are all materialists - however, we use different terms, and it is here that we end up having discussions that get us nowhere.
While as a scientist I understand the reasoning for this motto, if we think about it, we can cast doubt on just about everything in life - I can amuse myself by saying, “I do not take the Society’s word” also, since their motto amounts to their word.
My only disappointment regarding these type of discussions is the lack of discussion, query, criticism, by atheists of Christian theology. If we seek a better understanding of a subject, and to provide reasoning on it, we should have delved in it. I have yet to find anything of substance on this site (or pronouncements from prominent atheists) on serious theological reasons/maters/discusions. I guess you may understand why I would find this disappointing.
I cannot see how accountability comes into this discussion - we are accountable to God, and He knows our hearts. As I mentioned, we are asked to repent (change, leave our previous beliefs and outlooks, become more like Christ, etc), so a theist comes from a position where he acknowledges his errors and sins, and look to Christ for a renewed existence.
This is our evidence. It also includes reasoning, such as causality, our knowledge that includes that of beginning (after all we all begin at birth and end in death, so it is hardly a trivial assertion) .