The optimist is one who expects things to work perhaps more often than they actually do. As a result one would expect this person to become disheartened and filled with disappointment over time and revert to become a pessimist. Yet we would never describe someone as “currently in the mid-pessimistic part of the cycle and will be returning to the optimist state of mind in several months”.
So being labeled as either an optimist or a pessimist could be considered an insult – insinuating that you don’t change your view in light of new world probabilities. As J.M. Keynes asked,“When my information changes, I alter my conclusions. What do you do, Sir?”