Fails to see any difference other than "N/A" and "unpredictable": In the 50/50 case, the Kelly Criterion does provide an answer: don’t bet, because there’

Fails to see any difference other than "N/A" and "unpredictable": In the 50/50 case, the Kelly Criterion does provide an answer: don’t bet, because there’s no edge and no expected growth. In the unknown probabilities case, you can’t apply the formula at all, and you don’t have enough information to make an informed decision. You're essentially in the dark about how much to bet, and thus you cannot use the Kelly Criterion.