Theoretically, 1 thought stream would be sufficient enough to determine the settings of one his psyche. (The actions of a person is the extroversion of thought-stream. Hence an authentic sentence would say enough.) It is our inability to determine this as instantly. A hunch, can thus be taken seriously. As hunches, tend to be... Rather accurate. I could now, try to explain this hunch. But let's not bother as I still have no actual proof besides my own interpretation.
@own8ge, new to this, going to read about INTJ. If I can understand the cognitive functions, I cut down half the time typing self rather than getting confused over the millions of internet tests that will give a zillion different answers. Fun fun.