Book Description: This collection of papers is devoted to topics within the following area of inquiry: 'Falsehood opposes Truth; error is the obverse of the norm. Discussions of their interrelations appeal to the world of values.' CONTENTS: Introduction / 1. Philosophy of Error: Error as a Tool; Logic of Error; Counteracting Errors with Logic / 2. Errors and the History of Philosophy: History of a Fallacy; Is There a Logical Mistake in Plato's Argument (Meno 89A1-5)?; Some Remarks on Aristotle's Conception of Errors; The Cognitive Perspective in Aristotle's Logic; The Division of Terms in Ockham's 'Summa Logicae': The Blessing of Error; Spinoza on Error / 3. Errors in Knowledge and Language: To Err Is Human - To Study Error-making Is Cognitive Science; What to Do with Vagueness?; Going Wrong: To Make a Mistake, to Fall into an Error; The Two Kinds of Error in Action; Deductive Models and Practical Reasoning; PSYCOP and the Ancient Greeks / 4. Errors in Nature, Culture and Science: Some Whys and Wherefores in the Failure of Social Systems Design; Errors in Nature and against Nature; Nature's Errors and Culture's Errors; Artifical Intelligence and the Naturalness of Error / Index of Names / Key Words / Notes about the Authors