PANTHEON
ExploreBuild My Library
© 2026 Pantheon — an atlas of the ideas that shaped how we think.
person1970s-present

Laurence BonJour

Disciplines:
epistemology

Summary

American philosopher who developed a systematic coherentist theory of empirical justification and has also defended rationalism about a priori knowledge.

Core Contribution

The Structure of Empirical Knowledge: coherentism — an empirical belief is justified if and only if it is part of a maximally coherent system of beliefs. This generates the cogency problem: what ensures coherent beliefs are true? In Defense of Pure Reason: a priori justification requires rational insight into necessary truths — a defense of rationalism against naturalism.

Key Spikes & Highlights

  • The isolation objection to coherentism: a maximally coherent system of beliefs about a fictional universe would count as justified on BonJour's account, even though none of its members are about the real world.
  • BonJour recanted his coherentism in the 1990s, turning to foundationalism — a rare case of a philosopher publicly abandoning a major position he spent years defending.

Notable Works & Achievements

The Structure of Empirical Knowledge

In Defense of Pure Reason

Epistemology: Classic Problems and Contemporary Responses

Historical Influences

Wilfrid Sellars Roderick Chisholm

Intellectual Lineage

Analytic Epistemology

Contemporaries & Peers

Alvin Goldman Ernest Sosa

Minds Influenced

Epistemology Research

Intellectual Posterity

Coherentism A Priori Epistemology

Discussing

Laurence BonJour

Ask anything about Laurence BonJour — their ideas, influences, contradictions, legacy.

Sign in to start a conversation.