Three things are extremely painful to me:

  1. discussions with fanatics, because it is impossible to make them accept a different point of view ; different points of view and people having them just should not exist,
  2. discussions with people who can't be classified as fanatics but who are persuaded they get the truth just because their lack of general knowledge in a given area or their narrow mind can't accept the difference between an ideal world and the real one ; they are much more dangerous than the fanatics because their intelligence usually puts them in position of strength and visibility. That's exactly how dangerous politicians use the art of dialectic to win over a challenger even if they don't get the right answer.
  3. discussions with people who can't accept when a decisive argument is covered by a very strong confidentiality agreement and interpret that as a failure to give a decisive argument or, worse, as a lie.

No need to comment, I am fed up - really fed up - with dialectic lovers.