The best conclusion.

I think it's like most things we learn.

Good enough is good enough and we have to get on with other things.

For instance, we all learned to walk, and went on walking that way for the rest of our lives.

An expert may point out flaws and peculiarities in our individual walking styles, but most of us won't bother to take ballet training, or physical therapy to correct our quirks.

Thinking and decision making always involve limited information. We employ stereotypes, for instance, when anticipating people's reactions to our words and actions.

We know darned well that we have to make many decisions before we can gather every fact and anticipate every outcome.

It is in fact rational to accept some margin of error as part of the process.

Revising our general outlook or stereotypes - our handy shortcuts to hasty decision making - can be time consuming, like learning to correct the way we walk.

It probably usually isn't worth the bother.

It's good enough thinking.