I see common sense very similarly to JivinJeffJones. It's practical knowledge that one needs for survival. Common sense also depends on the context. Common sense around a construction site is not the same as common sense in a chemistry lab or common sense in a corporate office. Depending on the context I'd say that common sense can come from Te, Fe or even Se. Also a person with Ne can have insight into the nature of common sense even if they choose not to display it.
Another aspect of common sense is that the reasons behind doing something are often obvious, and therefore an elaborate explanation is not needed. You can give an elaborate explanation as to why a person shouldn't touch a hot stove, but it isn't needed. The reasons behind not touching a hot stove are obvious.
Individuals who have Si as their primary or auxiliary function often confuse tradition for common sense, but I don't believe they are the same thing. All introverted functions (including Si) are highly individualized compared to their extraverted counterparts. A person relying on Si might think that tradition equals common sense, because they equate the two, but in reality that is simply their viewpoint. An idea which seems to be "common sense" may in fact require more elaborate explanation, because it is more complex than what it seems at a first glance.
probably being an INxx contributes. INxx's tend to be more autonomous-minded, I think, from experience.
Ti = sees whether the behavior meshes with reality
Ne = sees all the other ways something COULD be done
There won't be a knee-jerk rejection that stems from just TiNe.... there will just be a "That doesn't make any sense!"
Those with Ni as a lead are more prone to have the "Don't tell me how to look at this situation!" kneejerk attitude. I think, anyway.
It's funny that you explain ENTP behavior as something caused by being INxx. ENTP's are not INxx's. That's just common sense.
Actually I'd describe this as something similar though. I think the closer a person is to INTP the more autonomous they are. Observation clearly shows that INTP is the most autonomous type while their opposite ESFJ is the least autonomous type. Also when you examine each of the "letters" individually you see that I's are more autonomous than E's. N's are more autonomous than S's, T's are more autonomous than F's, and P's are more autonomous than J's. It's not being INxx specifically that makes one autonomous, but specifically being similar to an INTP. INTJ, ENTP, ISTP, and INFP are all fairly autonomous though. (If you're reading this BlueWing this is not meant to be a compliment to INTP's, lol.)
