That’s it. No dogs, no cats, no monkeys.
A SIGNIFICANTLY better test is whether or not a typically hostile animal (including humans) towards ANY other animals and how they respond to seeing themselves in the mirror and do they attack the mirror or not is a SIGNIFICANTLY better test than the "I looked in the mirror, saw myself and nodded to myself" BS test.
We've had cats that INSTANTLY go into Fight or Flight mode whenever they saw/see other cats. It doesn't matter the circumstances. And even if it is a cat that they live with, some of those cats are STILL unhappy having ANY other animal sharing their space is NOT, NOT, NOT something they like at all.
When you have an openly hostile animal vs ANY other animal (EVEN HUMANS if they aren't known to be ones that feed them) and have them look in a mirror, we've had some cats that are still hostile to their own reflection even after years of seeing themselves they still have that Fight or Flight reaction at least for a moment but then they recognize themselves and they very quickly relax.
They never nod or wave or do any other BS "acknowledgement" of themselves other than relaxing when they NEVER relax even if you try to get them to accept another animal in their life and they never allow it without ALWAYS hissing if not outright attacking the other cat OR go into Flight mode.
THAT is a SIGNIFICANTLY better indication that they realize that it is themselves and not another animal.
Cats (and every other animal with some intelligence) for the most part figure out pretty quickly that they are looking at themselves. Any INTELLIGENT human should be able to recognize that. Scientists in the idiot section of human intelligence typically can't accept that 1) they themselves are just a smart animal - well more often than not 2) other animals are a lot smarter than they are willing to give credit for 3) recognize themselves a LOT more often than these "scientists" will give them credit for.
Question: What do you call a scientist that finished with the lowest GPA of ANY student in ANY college in ANY country in the world? A scientist.
There are a LOT of scientists in the world that have a MUCH lower intelligence than a typical person they walk past on the street. There a guy that I went to high school with that did the dumbest things like walking into a screen door IN HIS OWN HOUSE while growing up that we used to make fun of. And he wasn't doing it as a joke. How many times do you have to run into a screen door before you start sticking you hand out in front of you before you check to make sure that it is open or not? And he supposedly had good eye sight so that wasn't the problem. And HE has a job as a research scientist. We all joke that we would never use a product based on any research that he did.
