By one estimate, 30,000 genes determine the structure of the human brain.
There are 30,000 ways that two brains can be different—less if some genes
are fixed, but more if each gene has complex effects.
Those who still believe that intelligence can be measured by one IQ score may
step to the rear of the class.
copyright 1992, 2023 Jay J.P. Scott
<jay@satirist.org>