I figured this out quite a while ago. It is obvious. We "pretend" we know far more than we actually know. We only know enough to get ourselves into trouble, frankly. We are quite stupid about so much, and instead of humbly pursuing greater knowledge, the entire scientific and medical community is trying to suck like leeches off the profitable chronic diseases of the public. They have to continue their charade of pretending they know what they do not know. It's also a power trip for them.