Amusingly after a Google search, I see that 'third brain' is a thing (a paper gave that name to the epidermis, another gave it to the placenta, is a Spy Kids th

Amusingly after a Google search, I see that 'third brain' is a thing (a paper gave that name to the epidermis, another gave it to the placenta, is a Spy Kids thing, is a consulting company, is in the name of a book.)