A strongly arrogant person will usually try to downplay other people's achievements or ideas in order to make him or herself appear better. Arrogant people will even ignore or downplay good ideas from others, as they cannot accept that others might have better ideas than themselves. This makes reasonable communication difficult and arguments impossible to resolve fairly as the arrogant person will not accept the other person's point of view, no matter how logical/intuitive or correct it is, because the arrogant person is really having an emotional argument about his own arrogance.