Thanks for linking the actual paper. Conversation is definitely the wrong word to use, agreed. Still, when I make noises to my dog and he makes noises back the

Thanks for linking the actual paper. Conversation is definitely the wrong word to use, agreed. Still, when I make noises to my dog and he makes noises back there is definitely information being transmitted that's interpretable by both parties. So there should be some word that can be used to describe that exchange. Anyway, it's hard to tell from that paper (this is not my field, by any stretch of the imagination) if the Cetacean actually knew or understood that it was a human machine making those calls and not another Cetacean, which would probably be pretty confusing. In any case, this is still a step in the right direction so good luck indeed!