Owen Griffiths is a philosopher of logic and language, and a lecturer at University College London and the University of Cambridge. He is the author of several research articles and chapters in collected volumes, and winner of a 2022 Pilkington Prize for outstanding teaching at the University of Cambridge.A. C. Paseau is the Stuart Hampshire Fellow at Wadham College and Professor of Mathematical Philosophy at the University of Oxford. Author of more than 50 research articles and reviews, he has also edited the 5-volume anthology Philosophy of Mathematics (Routledge 2017) and co-edited the collection Mathematical Knowledge (OUP 2007).

• Introduction Prologue 1: Conceptions of Logical Consequence 2: What is Monism? 3: Against Pluralism 4: The LIFGIFS Hypothesis 5: Beyond the Finitary 6: Isomorphism Invariance 7: Towards the One True Logic 8: The Heterogeneity Objection 9: The Overgeneration Objection 10: The Absoluteness Objection 11: The Intensional Objection Conclusion

One True Logic is the first monograph to explicitly articulate a version of logical monism and defend it against the first challenge. It provides a critical overview of the monism vs pluralism debate and argues for the former. It also responds to the second challenge by defending a particular monism, based on a highly infinitary logic. It breaks new ground on a number of fronts and unifies disparate discussions in the philosophical and logical literature.

Owen Griffiths is a philosopher of logic and language, and a lecturer at University College London and the University of Cambridge. He is the author of several research articles and chapters in collected volumes, and winner of a 2022 Pilkington Prize for outstanding teaching at the University of Cambridge.A. C. Paseau is the Stuart Hampshire Fellow at Wadham College and Professor of Mathematical Philosophy at the University of Oxford. Author of more than 50 research articles and reviews, he has also edited the 5-volume anthology Philosophy of Mathematics (Routledge 2017) and co-edited the collection Mathematical Knowledge (OUP 2007).

• Introduction Prologue 1: Conceptions of Logical Consequence 2: What is Monism? 3: Against Pluralism 4: The LIFGIFS Hypothesis 5: Beyond the Finitary 6: Isomorphism Invariance 7: Towards the One True Logic 8: The Heterogeneity Objection 9: The Overgeneration Objection 10: The Absoluteness Objection 11: The Intensional Objection Conclusion

One True Logic is the first monograph to explicitly articulate a version of logical monism and defend it against the first challenge. It provides a critical overview of the monism vs pluralism debate and argues for the former. It also responds to the second challenge by defending a particular monism, based on a highly infinitary logic. It breaks new ground on a number of fronts and unifies disparate discussions in the philosophical and logical literature.

Owen Griffiths is a philosopher of logic and language, and a lecturer at University College London and the University of Cambridge. He is the author of several research articles and chapters in collected volumes, and winner of a 2022 Pilkington Prize for outstanding teaching at the University of Cambridge.A. C. Paseau is the Stuart Hampshire Fellow at Wadham College and Professor of Mathematical Philosophy at the University of Oxford. Author of more than 50 research articles and reviews, he has also edited the 5-volume anthology Philosophy of Mathematics (Routledge 2017) and co-edited the collection Mathematical Knowledge (OUP 2007).

• Introduction Prologue 1: Conceptions of Logical Consequence 2: What is Monism? 3: Against Pluralism 4: The LIFGIFS Hypothesis 5: Beyond the Finitary 6: Isomorphism Invariance 7: Towards the One True Logic 8: The Heterogeneity Objection 9: The Overgeneration Objection 10: The Absoluteness Objection 11: The Intensional Objection Conclusion

One True Logic is the first monograph to explicitly articulate a version of logical monism and defend it against the first challenge. It provides a critical overview of the monism vs pluralism debate and argues for the former. It also responds to the second challenge by defending a particular monism, based on a highly infinitary logic. It breaks new ground on a number of fronts and unifies disparate discussions in the philosophical and logical literature.