Finally, and after many tentative or haphazard changes, would come the grand chemical combination of these linguistic atoms into the compound linguistic molecules which we call propositions. The arrangement SB (or some other) would eventually crystallize and permanently signify The stag is big, and a similar form SK would permanently mean The stag is killed. These are two complete propositions, each with distinct subject and predicate. On the other hand, SB and SK (or some other forms) would permanently represent The big stag and The killed stag. These are not complete pro positions; they are merely qualified subjects waiting for their predicates. On these general ideas of linguistic development I have founded my symbolic system.