A person shouldn't be regarded solely as intelligent or unintelligent. A person is made up of many strong and weak points, good and bad points. Some people are scrutinized for being too smart, some people not smart enough, depending on the situation. In social situations, it's sometimes better to dumb down a bit whereas in professional situations, it's almost always better to be/appear smart. This has been said many times; there are different kinds of intelligence and the world needs all of those kinds. Just excellence in science isn't enough. Some people are better with books, others with people, others with objects ... It's rare to find someone intelligent in all aspects of life. Just because they are stupid or appear stupid in one situation doesn't mean they have nothing to offer or that they don't have a sense of humor or a sense of individuality or warmness. Qualities that are admirable and important. See beyond your idea of intelligent. If they are being blatantly stupid, just ignore it if you can. No need to ruffle your own feathers trying to change someone whose years/experiences made them stupid (about a specific something). Ignore, avoid, pick your battles as someone said. And try to see the good. I choose to ignore instead of wasting time and energy on people I can't change. What I said above may be too optimistic...just ignore if it's more trouble than it's worth. Stupid people with their stupid ideas exist. If you can't win something, change something, just step over it.