Tegmark has his name on a bunch of competently written AI papers: https://arxiv.org/search/cs?searchtype=author&query=Tegmark%2C+M https://arxiv.org/search/cs?

Tegmark has his name on a bunch of competently written AI papers: https://arxiv.org/search/cs?searchtype=author&query=Tegmark%2C+M https://arxiv.org/search/cs?searchtype=author&query=Tegmark%... In each case, the first author is Ziming Liu, which is more impressive than Tegmark's last author (PI) position. But still, it's fair to call Tegmark an AI expert.