>'No written language was ever devised in sub-Saharan Africa prior to outside influences.'
Is just plain wrong, see ( https://www.reddit.com/r/AskHistorians/comments/1nz7k6/were_... ) also it depends on what you mean by language, Genevieve Petzinger has shown a fully formed written cave art language going back since man (or woman) first started drawing in caves.
See, that's exactly what I expect as a rebuttal (the claim sounded fishy to me as well). The bad way to address it would be to say "that's a very racist thing to say, you white supremacist!".
Is just plain wrong, see ( https://www.reddit.com/r/AskHistorians/comments/1nz7k6/were_... ) also it depends on what you mean by language, Genevieve Petzinger has shown a fully formed written cave art language going back since man (or woman) first started drawing in caves.