Shamans and psychotics have visions. Visions say “we should vaguely go towards those mountains.” Visions are generally not falsifiable. I’ve never heard of a startup that says “welp, looks like you’ve failed to meet your vision.” You also can’t argue with a vision beyond “I don’t like that vision.”
Instead Definiteness means that you have a long-term plan towards a goal.
Startups does not mention the word vision once in the whole discussion of Determinism and Optimism.