Its kind of interesting how people feel that The Doctor is only simulated consciousness (or sentience) but Data is truly conscious and sentient. Based purely on their responses and they way they interact with others, I just don't see how one could make this argument. Now I agree that the Doctor could just be a very sophisticated program that appears to be sentient but is in fact no more sentient than the computer I'm typing this on. But then so could Data!
That is very true. I base my assumption on the fact that Data was designed to emulate humans whereas the EMH was deisgned to function as an encyclopedia/assistant only during emergencies. Programming the latter to be sentient would be morally questionable since it is a prisoner in sick bay and would be a phenomenal waste of computer resources. Further, if it is that easy to program sentience and/or if Data isn't sentient why did Data and the Daystrom Institute have such difficulties replicating Soong's research?