This is the crux. Communication is to convey meaning over language, which is arbitary. It's relative and arbitrary. It's thhat the purpose of communication is different than that of meaning and concepts. Life desires sameness, but exists only in a world of difference.
Life desires sameness, but existence is only difference.
If there only sameness, there is nothing. When there is difference, life seems to want to figure out why. There are, of course, other little things that need to be in place in this system, but they are minor as compared to the overall philosophy. The other simple things is that this system can't evolve in a vacuum.