The problem with being an intelligent, observant and understanding-I would not go as far as to say wise-person is that you tend not to be wrong very often. However, this very sort of person is very likely to be the type of person who will admit that they are wrong, if provably able. If it is regarding something unprovable, then right and wrong are a judgement call, subjective and otherwise an opinion that should be treated as such.
Far to many people take a debate as an attack on their authority. Their ego says that the are right and when you say they are wrong you are attacking them personally. Logically, to them at least: I am right->You disagree with me->Therefore you are not right.
The most severe are those who will not listen to argument and will never be convinced.
If you can change a person'q perspective, however, they can be much easier to persuade. For instance, those who become injured often have a greater understanding of those they may not have otherwise considered before, such as the plight of people who are confined to wheelchairs. Until that happens, however, few people can, or want to, relate.
I have said for years that I like being wrong, and in many cases this holds true. However, in some very particular cases, such as examination questions, being wrong can be very annoying.
Peace.