Size the Downside
You don't need to be sure a bet will win - you need to know the worst case is survivable and the lesson is worth it.

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The mechanism
The chart splits into two paths from a bet you can't prove will work. The left path waits to feel certain, certainty never comes, the quarter passes, and a competitor learns it first. The right path asks three questions - is it survivable, is it worth learning, is the cost capped - and if yes, runs a small, bounded test. Once the downside is capped, the decision stops being a gamble.
Part of Persistence. Infrastructure that keeps growth compounding past founder heroics.