Criteria for defining individual members of the preposition word class are set forth. Arguments are presented against calling prepositions meaningless, yet it is conceded and explained that those which occur in wider contexts are vaguer due to their greater variability. The unitary, polysemous, and/or homonymous nature of prepositions are…

Paragraphs, as well as sentences, can be spoken of as having a deep and a surface structure. The amount of deep structure of the paragraph that is mapped onto the surface paragraph is related to the mode of discourse in which the paragraph is found: the deep structure in scientific paragraphs is relatively uncomplicated with few assumptions made;…