> Blows my mind that so many people just have this hardened internalized idea that we're somehow significantly different than any other animal.

But we are significantly different, and there's always a danger of anthropomorphizing other species to explain behavior that we assume we understand because it reminds us of how we feel about things. That's why the paper calls for more study of "post-mortem attentive responses" in animal behavior to gain more insight into their cognitive capabilities.