In drafting that section of the report of the UNESCO Symposium, Diop claimed that Diop and Obenga's linguistic reports had a large measure of agreement and were regarded as "very constructive".[84] However, in the discussion thereof in the work Ancient Civilizations of Africa, Volume 2, the editor has inserted a footnote stating that these are merely Diop's opinions and that they were not accepted by all the experts participating.[85] In particular, Prof Abdelgadir M. Abdalla stated that "The linguistic examples given by Prof Diop were neither convincing nor conclusive."[86]