Preface Part A. SemioticsI. Virtual Classes, Identity, and DescriptionsII. Virtual RelationsIII. Individuals, Parts, and WholesIV. Events, States, Acts, and ProcessesV. Words and ExpressionsVI. Reference and AcceptanceVII. Prolegomena to Mathematics Part B. Linguistic StructureVIII. Harris's Systems of Report and ParaphraseIX. On Generative SemanticsX. Some Prepositional RelationsXI. Prepositional Protolinguistics IXII. Prepositional Protolinguistics IIXIII. Some Temporal AdverbsXIV. 'Now'XV. The Very Idea of a Logical Form Index