It doesn’t even matter if the child is blind, deaf, or both. Barring developmental disorders (such as some forms of autism), the child can learn language.
The analogy with chess is apt — computers play chess but in ways different from us by being able to brute force their way through millions more positions.
Professor Dave’s attacks undercut his credibility as a spokesman for his own view. If he had the truth on his side, there’s no reason he would behave this way.
A whole host of “certified geniuses” have failed to crack the human language problem, and this must count as a blow to Darwinian ideas of evolution.
Alfred Wallace was arguing his position from simple logic rather than on the authority of revelation from any of the Abrahamic faiths.