The truly "unknowable" is a short and mostly irrelevant list.  Most folks who claim they must "go with their gut" are just being too lazy to actually do the investigation necessary to make an informed decision.

In fact, the world is so certain and predictable, we amuse ourselves by inventing unpredictability.  From the roulette wheel to the American football that will not bounce predictably, we must make a great effort to simulate random behavior.

"Remember the I35W bridge--who needs terrorists when there are Republicans"