There are different ways of viewing the world. (You may have noticed ) Science has, for several centuries, used a "linear" model of "If A, then B" which has worked remarkably well but which is coming up against limitations every where we turn. The linear model is a grossly simplified way of looking at the Universe that filters out pesky details to keep them from overwhelming us. The alternative is a "non-linear" or chaotic model of "A = B, unless it is Tuesday" which immediately moves beyond our understanding.

Unfortunately for us, PD is firmly placed in that chaotic world of feedback loops and cascades for the simple reason that it wont fit the linear view. Heck, even writing about it fails. Look how linear this written page is! We need gestures and facial expressions and tears and laughter to really talk about it - some things that both PWP and neurology famously lack. Thank god for emoticons .

The only way to grasp a chaotic universe is by means of massive collections of data points that eventually form a picture that allows us to "grok" it as a whole. Sort of like 23andme is doing. The only shortcut that I can see is largely trial and error. Sort of like we PWP are doing. If only we could merge the two.....