[vasco]

There's also another phenomenon which is that whatever the latest idea is, it must be the best. Many people do this mistake and even convince themselves of being right now because "they used to think like that" before.

So at each stage in the loop they are always super convinced of the position.

[CamperBob2]

A type-1 moron believes the first thing he/she heard, and cannot be easily dissuaded with later arguments or evidence. Stereotypically speaking, many religious people fall into this category.

Conversely, a type-2 moron favors the last thing he/she heard, readily allowing it to dislodge any prior beliefs, values or intentions no matter how well-founded. Here in the US, our current president can be cited as an example of a type-2 moron.

In reality, we all fall into one or both of these categories on occasion, so it's best not to indulge in excessive self-assurance.

[psychoslave]

Even not being 100% confident, at some point people have to decide what to do.

Actions might include some continuous checks in them, like the famous plan, do, check, act.

Solipsism already tell us that anything beyond current present self experience, existence of anything is uncertain. So, almost everything one have to take for granted to make anything outside metaphysic argument require an act of faith.

https://en.wikipedia.org/wiki/Solipsism