Much as I like the term 'free thinker', could it not just as easily be applied to a believer as long as they were open to the possibility of being wrong, as I am about my lack of belief?

I suppose the answer is that it varies from person to person, but do the believers here think that is an unreasonable thing to expect of a believer, or does religious belief by definition normally demand no doubts whatsoever? That looks to be the case, but not being a believer, I've no idea really and I'd be genuinely interested what believers think.