Complex sentence: That we all seem to have own ego or self and with it comes a degree of cognitive bias or a general tendency to use "I am right" and "you are wrong" as a rule of thumb or Heuristic when making decisions.
Split into simpler sentences: That we all seem to have own ego or self and with it comes a degree of Cognitive bias. Tending to use "I am right" and "you are wrong" as a rule of thumb or Heuristic when making decisions.