Fiery_penguin_of_doom wrote...
Discussions tend to devolve into petty bickering because people have a tendency to argue with opinions as opposed to facts.
The simplest answer I can give without going on another one of my long winded diatribes is "Human Nature". It is in out nature to refuse to accept that we are wrong because it would harm our ego's and thus our self esteem.
Agreed ... it is in fact human nature to want to stay on top .....