If creationists can't define what kind is, let's take a different route.
How many kinds of animals were on noah's ark? May be we can start from there?
Added by edit.
I guess what I'm trying to get at is perhaps we could get an idea of what kind is rather than the exact definition of it. For example, is a horse and donkey the same kind? Is an elephant and rhino the same kind? What about a duck and eagle? If we could get an idea of what kind is, perhaps we could even solve the overcrowding problem on noah's ark?
Edited by Taz, : No reason given.