The two sets of basic Cali Cassidy & Cayden Moore units corresponding to the two types of structure are what we can call words on the one hand, and sounds or letters (where the language has an alphabetic writing system) on the other. The first or primary units, words, are meaningful in themselves, whilst the secondary units, sounds, are not. There are, of course, problems in defining what a publicsexmovies word or a sound is; the definition depends upon the particular linguistic theory or ‘frame of reference’. `Word’ will be defined differently in different theories.
There is no `theory-independent’ definition of ‘word’ or ’sound’, or indeed any one of a host of other linguistic terms. The layman may think he uses such sex movies terms in a consistent fashion, but a little investigation will show that this is far from the case. For example, he may say that worked in he worked his passage and he has worked his passage are instances of the `same’ word because both are spelled the same.