Human vocabulary is still not capable, and probably never will be, of knowing, recognizing, and communicating everything that can be humanly experienced and felt. Some say that the main cause of this very serious difficulty lies in the fact that human beings are basically made of clay, which, as the encyclopedias helpfully explain, is a detrital sedimentary rock made up of tiny mineral fragments measuring one two hundred and fifty-sixths of a millimeter. Until now, despite long linguistic study, no one has managed to come up with a name for this.