barehl, I've asked you several times to discuss the experimental consistency you refer to in your OP. Will you discuss it?
Hypothesis: human cognition and intelligence evolved over time from non-cognitive and lower intelligence organisms. To avoid lots of random, lucky jumps in brain structure, elements that are used at each level must be present in previous generations. And more than likely these elements will still be found in modern organisms that have lower cognition/intelligence.
I studied fruit flies, fiddler crabs, and honeybees and was able to document many elements that are needed to build cognition. I used these non-cognitive organisms because I can infer brain ability from behavior. This isn't a perfect choice because arthropods are not ancestral to humans; fish actually descended from round worms. But, I would expect that people who are more expert in these areas can find similar elements in round worms.
I studied territorial fish. I've seen many documentaries on reef fish. However, I used to keep aquarium fish like Dempseys and Oscars, so part of that is from personal observation. This seems consistent because I did not see these characteristics in smaller fish like guppies, mollies, or tetras.
Up from fish would be amphibians. However, there don't seem to be any surviving species of amphibian with behavior more complex than fish. Presumably there were prior to reptiles.
I had a ball python and an iguana. However, nothing in their behavior came to mind as interesting so I studied alligators. I found additional complexity over fish. There are suggestions that monitor lizards are smarter.
The only remaining link we have between reptiles and mammals are the monotremes so there isn't much to study.
I studied beavers because they seem to have more complex behavior than other mammals except primates and a few mammals like honey badgers and raccoons. Beavers seemed to be a good choice because of the social organization which we don't see with raccoons or badgers and because beavers are in the same super-order, Euarchontoglires, as humans whereas raccoons and badgers are in the order Carnivora. I used some dog behavior.
I've seen a number of documentaries on chimpanzee behavior and that was an obvious choice.
And then you have the behavior of very young children and some experiments like change and attention blindness.
Then I compared behavior to brain size, for example mice versus rats, but particularly for animals larger than humans.
Then I did multiple surveys of information complexity, volume, and speed and neural length and speed, and sensory volume and complexity, and things like embryonic development. And I compared with computational theory, information theory, decision theory, and evolutionary theory.
My ideas about cognition are consistent with the evidence that I've studied and consistent with theories that are not related to consciousness. I'm not aware of any existing theory of consciousness that agrees with mine but I have been able to disprove everyone that I'm aware of.