80 %

The following link to a TED talk contains a fascinating concept regarding what the brain is for, and how it is linked to movement. It perhaps explains why training in uncertainty, like Random Flow, is so powerful.
Flow training, or other training that is random and unpredictable, gives a wide range of input to add to our memory bank, so that new stimulus inputs can be guaged more efficiently.
Of course this does mean that getting RELEVANT and CONTEXTUAL input during the flow is important, and why true flow training is a skill set that becomes pointless if it strays too far from reality or gives no useful feedback.

Interesting observations about escalation also ....

http://blog.80percentmental.com/2012/03/daniel-wolpert-on-why-you-have-brain.html#.UPE5-WeZh8F