Am well aware that 'changing definitions' constantly alter the specificity of symptoms which one is attempting to correlate. That's an expected consequence of new lore, and of the N! arithmetic of any large scale view.

My (sufficiently general) thesis remains -- there is damn little $$ spent to pursue the overall effects of [most of] the millions of substances now to be found in trace amounts in tissue -- which track the er, Industrial .. in some cases, like Dumth-rising? .. Devolution.

(My statistically-unworthy lifetime sampling reveals, simply: dumbth Is on the rise.)
I'm not yet sure if the i-Pod and its now conditioned-effects, the perpetual tuning-out of all other environmental activities: will be a large marker in a dumbth investigation of say, 2017? Ten years enough for a new benchmark on 'consciousness level'? If anyone can still do stats, then.. of course.

Imagine: [massive varieties of contaminants + techno consciousness-lowering devices]:

Working Together! >to make the cockroach #1 species on Terra<

;-j