Mark reminds me that there two kinds of uncertainty involved here.
When you are standing on the tee, you might be uncertain about (a) what your strategic alternatives are, or (b) what strategic alternative is the best.
When Simpson, Behr and (maybe) Darwin talk about great holes being hard to nail down, I think they mean both kinds of uncertainty. I would think, however, that the uncertainty you find in most great holes is of the (b) type.
Bob