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I too am not a high school dropout as alluded to by Sarah, I am not mute in most situations in fact can be highly sociable but do need that down time. Most importantly, I have very little interest or knowledge about auto mechanics and industrial art. In fact during my school days I did not fare well in either.

To clarify on this inquiry, it needs to be mentioned that Keirsey made a slip in describing SPs in comparison to the other temperaments since his descriptions for the four SPs are written when considering Se and to some extent Si for SJs. Clearly that could not be done with NT and NFs since they all have varying cognitive functions. So when SP is referenced are you consciously considering that ISPs will have a cognitive function that is dominant (Ti/Fi) that does not take into account the Se?