Do you know, the only people I can have a conversation with are the Jews? At least when they quote scripture at you they are not merely repeating something some priest has babbled in their ear. They have the great merit of disagreeing with nearly everything I say. In fact, they disagree with almost everything they say themselves. And most importantly, they don't think that shouting strengthens their argument.
[Doubt] is not a new idea; this is the idea of the age of reason. This is the philosophy that guided the men who made the democracy that we live under. The idea that no one really knew how to run a government led to the idea that we should arrange a system by which new ideas could be developed, tried out, and tossed out if necessary, with more new ideas bought in - a trial-and-error system. This method was a result of the fact that science was already showing itself to be a successful venture at the end of the eighteenth century. Even then it was clear to socially minded people that the openness of possibilities was an opportunity, and that doubt and discussion were essential to progress into the unknown. If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.. Doubt is not to be feared, but welcomed and discussed.