Crowd-sourcing or Expert-sourcing?

Crowd-sourcing is sometimes pitched, deliberately or not, as a sort of cure-all artificial intelligence, when in fact it is essentially averaging. The problem is, of course, that averaging eliminates individual differences and homogenizes instead of specifying. Naive "crowdsourcing" would lead every single shoe to be size 9.

As always, useful/interesting inference comes from intelligently specifying sources of variance.