When you know something but can't justify it to yourself.

[ignoramus]

What you do is called backwards rationalizing.
You arrive at your conclusion first and then rationalize it. Not rationalize first and conclude afterwards.
I believe it is stemmed from a yearning to live up to some expectations some people may have imposed on you, for example if someone important in your life (your mom) wants you to always be a good guy you'll backward rationalize your non-good guy deeds so that you still fit the picture of a good guy , you feel the need to rationalize your behaviors so that they are aligned with the expectations of someone in your life,or your own conscious. You're a people pleaser aka the good guy It means you're good with people.
Personally, I've seen this type of behavior in lots of chicks but some guys are no exception either.

Not valid without accompanying algebraic equations for us laypersons.