What does it cause you to do?It seems that the 5's isolation comes from their fixation, which is collecting knowledge, which comes from their fear of being overwhelmed by the world. I fear not being good enough and making mistakes, but that doesn't cause me to collect knowledge.
Why?I may be a recluse, but in my isolation I'm not really collecting information (except typology stuff, but I'm not sure that counts :P)
You don't have to reading a science book to be collecting knowledge, y'know. And "collecting knowledge" doesn't mean memorising facts, either - its all about attaining some sort of understanding.