Bias:
prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.

Prejudice:
preconceived opinion that is not based on reason or actual experience. 

I stick to my guns, I am not biased at all in the pure definition of the term, clearly yes I liked the idea of a car, bought it and it vastly exceeded expectations, my posts relate my experience with it...

 

Post purchase rationalization?  Not in this household, we are lucky enough not to have to live with something that does not reach some level of expectations, life is too short to drive an average car angry

Cognitive dissonance: the state of having inconsistent thoughts, beliefs, or attitudes, especially as relating to behavioral decisions and attitude change. I have not seen much of that here, on the contrary, people are making irrational and dishonest statements to defend impossible positions they have cornered themselves in...