Preface. Introduction. The Epistemology of Keith Lehrer; E.J. Olsson. Externalism vs. Internalism. 1. Epistemology: Does it Depend on Independence? E. Sosa. 2. Why Not Reliabilism? J. Greco. 3. Justification and Proper Basing; J.L. Kvanvig. 4. Lehrer on Knowledge and Causation; T. Stewart. 5. Can we Grasp Consistency? V. Halbach. Coherence and Personal Justification. 6. Reasonable Acceptance and the Lottery Paradox: The Case for a More Credulous Consistency; G. Ross. 7. Relational Coherence and Cumulative Reasoning; C.B. Cross. 8. Lehrer Meets Ranking Theory; W. Spohn. 9. Two Dogmas of Probabilism; C.G. Wagner. Trustworthiness. 10. Lehrer, Reid, and the First of All Principles; J. Van Cleve. 11. Self-Trust and the Reasonableness of Acceptance; G.J. Mattey. 12. The Dialectic illusion of a Vicious Bootstrap; R.N. Manning. Undefeated Justification and the Gettier Problem. 13. Lehrer's Dynamic Theory of Knowledge; H. Rott. 14. Some Remarks on the Definition of Lehrer's Ultrasystem; G. Haas. 15. On Lehrer's Solution to the Gettier Prob1em; J. Rosenthal. Skepticism. 16. Skepticism, Justification and the Trustworthiness Argument; J.W. Bender. 17. Coherence, Knowledge and Skepticism; P. Klein. 18. The Ultrasystem and the Conditional Fallacy; D.A. Truncellito. 19. Coherence, Circularity and Consistency: Lehrer Replies; K. Lehrer.