At this point, the man is based. Reducing uncertainty is rational. It might delay moral progress, but to do otherwise is a high risk high reward move, which is what the girl is aiming for.
If you live in a more peaceful time and place than what is shown here, its the more important to do what he said: document and verify your thoughts. Contemplate from other perspectives. Identify what governs your mind the most.
I'll add two: understand others and the environment as muuuch as possible. At the same time, whether through tech, engineering, or love, do whatever you can to contribute to a system that can create more abundance so that we can accomodate others as what we observe in the first step.