| Ph.Ds, high IQs, and intellectual honors are not antidotes to thickheadedness. |
| Burt claimed to have studied fifty-three pairs of identical twins separated at birth and reared in different environments, and to have found that their IQs were very similar. |
| Shockley was himself a eugenicist and racist who once proposed that the government pay people with IQs under 100 if they would voluntarily submit to sterilization. |
| Polycyclic aromatic hydrocarbons have already been linked to lower IQs, anxiety, depression and attention deficit disorder. |
| Despite Atkins, people with IQs lower than 70 have since been executed. |
