The notion that blacks are of lower intelligence found popularity in years of slavery when politicians and political scientists devised methods of justifying inequalities in the distribution of opportunities as well as to guide policies that segregated blacks.
As more and more blacks become educated in the field of statistics, they begin to challenge the statistical tests used in inferring intelligence, with questions being raised about sampling techniques and circumstantial factors such as socio-economic evolution.
Intelligent people should know that oppression, poverty and deprivation can impose constraints on the efficacy of the mind. Now, how do you oppress a person and watch them live in poverty and expect them to perform as the same efficiency as a resourceful person?
Many blacks know that the whites are notorious for greed and would use harness their resourcefulness to manipulate under resourced black in every way possible. For example, we learn of blacks that pioneered important inventions but whose contribution has been concealed in the face of the jealousy of the white man. Many of us have experienced situations where if you achieved something from your effort and ability, your white counterparts would wish it had been achieved by whites. Whether this is intelligent is questionable.
After all, who has the authority to validate measures of intelligence?