Many Ips seem to develop siege-mentalities; they often get suspicious of everything and everybody that don't measure up to their own sets of standards - fault finders and critics. They tend to not allow people to get close if they pose even the slightest hint of what they believe is improper behaviour or outside their established norms (which often rule their lives). This is a sort of safety-first approach and can have huge benefits, but tends to stifle overall progress and some potentially beneficial relationships. Now, every type can develop tunnel-vision but not normally to the extent that this temperament can; an Ip's ability to hyper-focus on certain aspects while disregarding irrelevancies (even operate in absolute chaos) is a gift as well as a curse......

a.k.a. I/O