[a_square_peg]

Yeah - I'm currently reading 'Why We Sleep' by Matthew Walker (excellent book by the way) and it mentions that this theory has been debunked.

[honkdaddy]

I haven't read Why We Sleep yet, but I do remember a post[1] on here a while ago which found issue with some of the books' claims. YMMV

[1] https://news.ycombinator.com/item?id=21546850

[a_square_peg]

Oh wow, that's interesting. Will take a look - thanks for the info.

[Edit] - Ok, I read the review and I can see why you added YMMV.