Is this falsifiable? I would be hesitant to claim that this is unique to humans. I'd probably agree with dogs, but the line is much blurrier with primates, for example.
I'm open to any evidence. I doubt we can find a Chimpanzee that sat, thought about it for awhile, slept on it, and then decided it's time to live like a Bonobo. I think the best evidence we have are actual metamorphosis that you see from a tadpole over to a frog, things of that sort. We're the only species that can do something to our nature actively.