The other assumption or bias that influence our perception is Halo effect that is our over estimated belief that someone possesses other positive qualities as well just because we see a single, powerful positive quality in that person. For instance if a person is handsome or charming, people assume him to be smart and trustworthy, too. And in a kind of reverse-halo (a pitchfork effect), if a person is shy or charmless, people will assume him to be dull and unskilled as well.
We are also victims of the other toxic assumption called False consensus (People believe what i believe) is our over estimated belief that our attitudes are universal, normal and agreed upon by others. For example, people who are quick to lose their tempers, who cheat on their spouses, or who take drugs overestimate the frequency with which others give in to these temptations, too.
They say Everybody does it, I’m not so different. But when it comes to goodness, it’s a very different story—because we tend to believe that we have better values and are generally more honest, kind, and capable than others are. Psychologists call this assumption false uniqueness.