Stop waiting for certainty to perform a job probability was designed for.

Certainty is not available for most of what matters, and demanding it is asking for the wrong kind of answer. What you can have is a reasonable sense of likelihood, and acting well means working with odds rather than guarantees. Thinking in probabilities lets you move without pretending you know.

For a stuck decision, try estimating roughly how likely each outcome is instead of asking which one is certain. Then act on the balance and plan for the case where you are wrong. You will make better decisions and be less shaken when one goes badly.