The entrepreneur takes risks but does not see himself as a risk-taker, because he operates under the useful delusion that what he’s attempting is not risky. Then, trapped in mid-mountain, people discover the truth—and, because it is too late to turn back, they’re forced to finish the job.
You don’t need to know in order to do. In, fact you just need to have some doubt and then just go.
Doubt, in fact, could motivate