For example, I believe that Einstein's cosmological constant is correct. I kind of have to, or the theory of general relativity doesn't work. But that doesn't mean I give two hoots about it, or that I believe that it gives one hoot about me. It's not that I don't believe that ad hoc is necessary, it's that I don't believe that I need to believe in it to make everything work. Oh wait...Yeah, I do. n/m.