[Sir_Substance]

>I don't think there exists a reliable yardstick of brilliance.

I'm afraid that's not an acceptable answer. I'm rejecting your viewpoint in favor of currently accepted mainstream psychology until you can back it up with measurable fact.

[na85]

I'm on mobile and can't link it but I encourage you to read a recent study published in Neuron by Highland, Owen et al about this matter.