I realize that this topic has been discussed, probably ad nauseum. 
I don't really have much to add except that I think they can. We have several examples here. I started this in order to answer Beth's question from another thread.
I think an example would be someone like Martin Gardner.
http://en.wikipedia.org/wiki/Martin_Gardner#Religious_and_philosophical_interests
Linda
I don't really have much to add except that I think they can. We have several examples here. I started this in order to answer Beth's question from another thread.
Then I'm confused about your stance again. This is the conversation sequence I'm not understanding:
Linda: I don't see atheism as the only rational outcome. For example, I think that theism can be rational, as well. It isn't belief that defines the position as rational, but rather the approach.
Ivor: What approach would that be?
Linda: Optimizing outcomes, allowing yourself to be informed by systematic observations, logical inference.
Ivor: While I can possibly see how Deistic God beliefs may remain after adopting the techniques you have described above, I cannot understand how Theistic God beliefs could be maintained.
Linda: As a convenient fiction?
Beth: Do you see maintaining theistic beliefs as a convenient fiction to be rational?
Linda: Not personally.
Could you please provide an example of what you consider to be a rational approach that leads to theistic beliefs?
I think an example would be someone like Martin Gardner.
http://en.wikipedia.org/wiki/Martin_Gardner#Religious_and_philosophical_interests
Linda