What gives logic the right to rule?
Every argument, every discipline, every claim to truth depends on the laws of thought. Contradiction is treated as forbidden. Valid inference is assumed to command assent. Rationality is universally regarded as binding. Yet an uncomfortable truth sits silently beneath all modern philosophy:
Logic itself has no accepted explanation for why it binds at all. In
The Ground of Logic, S. C. Sayles exposes the hidden fault-line running beneath the entire modern intellectual world. Drawing on decades of work in metaphysics, analytic philosophy, Reformed theology, G�delian incompleteness, and his own groundbreaking framework of
Jurisdictionalism, Sayles demonstrates that every attempt to ground logic in psychology, evolution, convention, formal systems, or autonomy collapses into circularity, arbitrariness, or nihilism.
This is not another book about argument forms, fallacies, or symbolic calculation.
This is a book about
authority.
Sayles argues with philosophical precision that:
- Logic behaves like law, not custom.
- Inference issues obligation, not suggestion.
- Contradiction is not simply false-it's impossible.
- No system can certify its own legitimacy, as G�del proved with mathematical finality.
- Rationality presupposes a court, and no court can constitute itself.
Through a seamless integration of Van Til's "concrete universal," Plantinga's epistemology of warrant, and Sayles's own jurisdictional analysis,
The Ground of Logic reveals that the laws of thought require a ground beyond thought-a source of authority proportionate to their universal, binding force.
This book is simultaneously analytic and devastating. It dismantles the last refuge of autonomous rationality and exposes the one question the academy has quietly avoided for centuries:
If logic binds universally, where does its authority come from? For philosophers, theologians, mathematicians, apologists, and anyone who has ever felt the weight of rational obligation,
The Ground of Logic is both a forensic investigation and a courtroom revelation. It is precise, uncompromising, and intellectually bracing-an indispensable contribution to contemporary philosophy and the clearest articulation yet of Sayles's lifelong project: the recovery of meaning, truth, and judgment under rightful authority.
A book for readers who refuse to settle for circular answers-and who want to understand why reason itself demands more. Logic rules every discipline on earth-science, mathematics, law, history, philosophy, and even scepticism itself. We all assume that contradiction is forbidden, that validity obligates assent, and that irrationality is not merely mistaken but culpable. Yet modern thought cannot answer the most basic question:
Why does logic bind at all? In this bold and uncompromising work, S. C. Sayles exposes a truth the academy has avoided for generations:
logic behaves like law, but no system can legislate itself. Naturalism cannot generate obligation. Convention cannot create necessity. Evolution cannot produce normativity. And formal systems-after G�del-cannot even prove their own consistency, let alone justify their authority.
The Ground of Logic shows that the entire enterprise of reasoning presupposes a court before which every thinker stands. Drawing together the metaphysical insight of Van Til, the epistemic clarity of Plantinga, and Sayles's own pioneering framework of
Jurisdictionalism, this book demonstrates that logic's universality, necessity, and binding force can only be grounded beyond the system of reason itself.
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