Pierre and circumspection in belief-formation

Upon discovering that the place he is now calling 'London' and deprecating as unlovely is the same town as the one that he had previously been calling 'Londres' and extolling as 'jolie', what would Pierre do? If he is wise, he would castigate himself for rashly jumping to premature conclusions on the basis of insufficient evidence. But his evidence is as strong as that of his Parisian friends who also judged Londres jolie, and of his new London neighbors who rate their town not beautiful. All this shows is that they too (and we too) should be more circumspect when forming beliefs. It reflects poorly on the human race that we generally don't.