It’s a reference to Bernard Shaw, who once said that if we ever created a truly artificial mind it would be inside a turtle’s shell. Sturgill Simpson covered the track on his seminal work, Xeno’s Paradox.
an LLM tells me there is no evidence that Bernard Shaw ever said any such thing :)
Might be a reference to the story at the beginning of A Brief History of Time, attributed to Bertrand Russell’s audience member.
Full story in the book