And here's a recent counterpoint: http://news.harvard.edu/gazette/story/2015/05/new-clarity-ag...?

What do you guys think? Who is right? I guess the main quote is:

> We showed that if you use human neurons made from stem cells and you grow it in a gel that mimics the brain, that indeed amyloid causes tangles. So now there’s no doubt. And if you stop the amyloid, you stop the tangles.