>>>Which of course, isn't exactly evidence that "HUMANS and no other creature CONTINUE to grow intellectually, while other species remain just as primitive as they were 1,000,000 years ago." You get the idea. : )>>>
Uhhh, no. You haven't made any point except that animals haven't developed at anywhere near the rate of humans.
Rate? That wasn't in your original assertion. Even so, this new assertion remains nothing but an assertion.
There are approximately 1.5 million known species (leaving aside those we have not yet found or cataloged). We simply don't know whether the cognitive capacities of some of those species have increased since speciation. Placing a rudimentary (and fictive) numerical value on cognitive capacity, assume that humans started 150,000 years ago with a capacity of 5, and that has since increased to 7. How do you know that non-human species "x" didn't start out 150,000 years ago with capacity .01, and has since increased to .07 (a comparable rate of increase)?
What we don't know about the cognitive abilities and capacities of non-human species is, well, a lot.