Koko is a great example! I should clarify that when I say evidence, I mean the collected body of scientific evidence, of which Koko would be one data point. I will also clarify that I was talking about weak evidence for sapience in dogs, not animals in general. Different species are different. We have much more evidence for sapience in animals such as simians like gorillas, as well as dolphins. Just because gorillas are sapient doesn't mean Koalas are likely to be. But heck Cows may well be more intelligent and closer to sapience than dogs.

None of this is to put a downer on how folks may perceive dogs and it certainly doesn't shut the door on their possible sapience. I project all of the sapience into my dog. I just think it's important to understand and acknowledge where scientific knowledge is at as we rely heavily on it for policy, if not individual beliefs.