From wikipedia:
Sensing and intuition are the information-gathering (perceiving) functions. They describe how new information is understood and interpreted. Individuals who prefer sensing are more likely to trust information that is in the present, tangible and concrete: that is, information that can be understood by the five senses. They tend to distrust hunches, which seem to come "out of nowhere."[1]:2 They prefer to look for details and facts. For them, the meaning is in the data. On the other hand, those who prefer intuition tend to trust information that is more abstract or theoretical, that can be associated with other information (either remembered or discovered by seeking a wider context or pattern). They may be more interested in future possibilities. They tend to trust those flashes of insight that seem to bubble up from the unconscious mind. The meaning is in how the data relates to the pattern or theory.
[Source]
I've read just a handful of your posts, but what I've read leads me to believe that you tend to buy into some strange beliefs about personality types. (Left handedness means you're an N; if you're intelligent then you're an N; etc.) Very subjective and actually can be proven wrong--which is where a concrete SJ thinks and lives.
I tend not to believe it unless it can be demonstrated, replicated, and determined to be factual, empirically. If you throw a new concept at me, I'm going to sit back and reserve judgment until I can research and determine whether or not it is correct via the above methods. Otherwise, if what you've said agrees with my experiences, I'll agree with you, but if what you've said contradicts my experiences, I'll shoot it down.
We deal in facts. Theory and what ifs are great if they have some relevance to our lives. Otherwise, we'll leave the theoretical musings to the dreamers and get busy with working to make our life and the lives of those around us as enjoyable as we can.
Yes, we can use intuition to deduce what is going on around us, but we don't tend to feel comfortable with it. Instead, we prefer to use our senses to figure out what is happening concretely. So sometimes we seem a little dense, but it is because we don't trust the intuition and want to see something concrete to back up our intuition. OTOH, those that rely on intuition can seem pretty flighty and out in left field when they follow their intuition at the expense of the facts. So sensors can seem dense at times and intuitive thinkers can seem flighty with their head in the clouds.
This is where the basic communication disconnect occurs. Sensors have to work more on trusting some intuitive's ideas, while intuitives have to work more on relating their ideas to concrete reality.
IRL, I get along great with many intuitive types. We just have to try to understand each other a little bit.
HTH