The reason you aren't going to define "human" is more than a confusion about logic. It's because you've realized that defining the term would invalidate the idea that humans did not evolve from other hominids. No matter where you draw the line, it's a loser for creationism. See the chart above. This is why you aren't about to define what a human is.
Sorry, no more word games. You can step up and present a testable definition of "human" or you can continue to argue what "is" is. Your choice.Is the word, "human", a human? Yes or No?
Is a human the word, "human"? Yes or No?