People often say I don't have any common sense, and it think this messes with me more than I think... If that is possible. On multiple occasions, my mother has criticized my slow response time to urgent issues, such as spilling a glass of milk. She'll often say, "don't think about it--just do it!" My only response is that I have an instinct to investigate a situation fully before taking action. I haven't decided yet whether this is helpful or harmful, but I can definitely see myself keeping relatively calm in a life-or-death situation. I'd hope this'd be helpful.
What for others is common sense is not always easy to come by myself. I think NTs' thought that they are thinking in the best way is poisonous--one can only judge based on how the majority takes action. Agreeing with what one earlier said, I believe that logical thought should be common sense, too. Why should one assume to keep off a certain section of a field if it says "keep off of grass" as opposed to the whole thing? Why should one assume that another knows what one is thinking? There needs to be some other information, and there is; unfortunately, it is entirely invisible to every sense, and only the NTs can seem to decode it.
They assume that other people make the same assumptions as they do, which in the end limits the number of people who can relate to them.