Aphorisms: Do you know?
You never know until you try, except sometimes.
You can not predict the future with 100% accuracy. But on the other hand, you’ve been around the block a few times; sometimes you can see events before they happen with uncanny precision. People are very predictable, or you know that your snowboarding skill is *well* below the level required to stay upright on the way down this cliff. Sometimes you know.
Obsolete saying:
You never know until you try.
