Chapter 11 Predicate Logic: Metatheory The Logic Book by Merrie Bergmann, James Moor, Jack Nelson Notes by Alex Guevara Notes 11.1 Semantic Preliminaries 11.2 The Soundness of PD, PD+, and PDI 11.3 The Completeness of PD, PD+, and PDI 11.4 The Soundness of the Tree Method 11.5 The Completeness of the Tree Method