Your source states  About the BlackWhite difference in IQ which at the time was about  points the Neisser et al  article stated There is not much direct evidence on this point but what there is fails to support a genetic hypothesis That conclusion stands today There has been no new direct evidence on the question See Rushton  Jensen a b Gottfredson  and Lynn  Vanhanen  for the view that the BlackWhite IQ difference is owing substantially to genetic differences between the races and that indirect evidence having to do with such factors as reaction time and brain size is probative See Nisbett   for the view that the direct evidence indicates that thedifference between the races is entirely due to environmental factors and that the indirect evidence has little value Please stop lying     Then applying the same defintion to C the answer is no Do you see the problem here           Question C Is the Hereditiarian position a mainstream view    The question is whether it is a widely held mainstream view that the IQ test score gap is likely to be significantly explainable by genetic factors Note that the question is not whether it is the only mainstream view nor whether it has been proven to account for the entire gap but only about whether it is considered a probable explanation by a wide selection of mainstream scholars     Yes           Question D Is Richard Nisbett considered a mainstream scientist    The question is whether Nisbett as a person and a scholar is generally considered to be within the mainstream of the field of Psychology The question is not whether he is prominent and notable enough to be included but about whether his views should be given equal weight to mainstream views within the article        No Nisbett holds a minority view which has been described as having virtually no chance of being true by a reliable tertiary source