Introduction (Darren Bradley).- Part 1: Language Pluralism and Metaphysics.- 1 Ontological disputes, Stalemates and Metaontological Pluralism (Delia Belleri).- 2 (Neo)Carnap and (Neo)Quine as quiet Relativists (Suki Finn).- 3 Carnap, Language Pluralism, and Rationality (Matti Eklund).- 4 The debate between Carnap and Quine? (Jody Azzouni).- 5 How (Not) to Avoid Metaphysics (Otávio Bueno).- Part 2: Theory Choice in Philosophy.- 6 Theory choice, primitiveness, and metaontology (Jiri Benovsky).- 7 Carnap and Theoretical Virtues (Jonathan Tallant).- 8 Material Composition and Bayesian Priors (Darren Bradley).- 9 Hume's Razor vs. Humean Recombination (Sam Cowling).- 10 A Carnapian Vision for Philosophy: Improving Concepts for Non-mirroring Understanding (Eve Kitsik).- 11 Against Dismissivism (Andrew Brenner).