The real advice we should give people is more complicated than you can fit in a four-word slogan: Quit while you're ahead . . . when the game you are… - Annie Duke

Silicon Valley is famous for mantras like "move fast and break things" and implementing them through strategies like "minimum viable product" (MVP). These types of agile strategies can only work if you have the option to quit. You can't put out an MVP unless you have the ability to pull it back. The whole point is to get information quickly, so you can quit the stuff that isn't working and stick with the things that are worthwhile or develop new things that might work even better.

Fake news works because people who already hold beliefs consistent with the story generally won't question the evidence

Because of that, a planning process that includes a premortem creates a much healthier organization because it means that the people who do have dissenting opinions are represented in the planning. They don't feel like they're shut out or not being heard. Everyone's voice now has more value. The organization is less likely to discourage dissent and thereby lose the value of diverse opinions. Those who have reservations are less likely to have resentment or regret build if things don't work out; their voices were represented in the strategic plan.