One/Forbidden Knowledge: Moral Limits of Scientific Research -- 1. A Range of Positions -- 2. Regulation vs. Laissez Faire -- 3. Moral Limits Pertain to Different Aspects of Knowledge -- 4. Can Knowledge as Such be Morally Inappropriate? -- 5. Knowledge is Only One Good among Others -- 6. The Enforcement of Morals -- 7. Coda -- Two/Truth as Ideal Coherence -- 1. The 'Continuity Condition' Relating a Criterion to the Definition of Truth -- 2. Truth as Ideal Coherence -- 3. Coherentism and Truth as Adequation -- 4. Postscript: The Gap Between the Real and the Ideal -- Three/Rationality and Consistency -- 1. Consistency: Initial Requisite or Ultimate Ideal? -- 2. Linearly Inferential vs. Dialectically Cyclic Reasoning -- 3. Ampliative vs. Reductive Reasoning -- 4. Two Very Different Sorts of Acceptability: Qualified vs. Outright Belief -- 5. Different Attitudes Towards Consistency -- 6. The Place of Dialectics in the Human Sciences -- 7. Must Inconsistency-Tolerance Be Motivated Epistemically? -- 8. Consistency as a Cognitive Ideal -- Four/An End to Science? -- 1. Is Scientific Discovery an Inherently Bounded Venture? -- 2. Nature Might Exhibit an Unending Complexity of Physical Constitution -- 3. Nature Might Exhibit an Unending Complexity of Lawful Comportment -- 4. The Phenomena of Nature Might Be Unendingly Diverse -- 5. The Basis for an Unending Prospect of Scientific Discovery Might Lie Wholly in the Character of Our Inquiry Processes -- 6. The Regulative Rationale for Supposing the Cognitive Inexhaustibility of Nature -- Five/On the Probabilistic Bearing of Testimony -- 1. Introduction -- 2. The Reliability of Sources -- 3.The Knowledgeability of Sources -- 4. Some Variations -- 5. A Survey of Probative Virtues -- 6. The Taxicab Problem -- 7. Hume and Laplace on Human Testimony -- 8. Laplace on Testimonial Chains -- 9. The Moral of the Story -- Six/The Limits of Probabilistic Epistemology -- 1. The Probabilist Program -- 2. Probability Is Not Enough -- Seven/The Threefold Way -- 1. The Three Levels -- 2. Some Examples -- 3. Man as a Creature of the Threefold Way -- 4. The Question of Legitimacy: The Utility of the Ideal -- Eight/Number Idolatry and Fallacies of Quantification -- Nine/Life's Seasons: The Conceptual Phenomenology of Age-Periodization -- 1. The General Idea of a Life Cycle -- 2. The Rationale of Human Age-Periodization Phase Transitions -- 3. The Diversity of Age -- 4. The Conventionality of Phase Transition -- 5. Thought Experiments -- 6. The Upshot -- 7. Broader Vistas -- Ten/Philosophical Taxonomy as A Philosophical Issue -- 1. The Shape of Philosophy: Some Ancient Views -- 2. The Middle Ages and Early Modern Times -- 3. A Later Picture -- 4. Taxonomic Dynamics -- 5. The Post-Kantian Transformation -- 6. Taxonomic Proliferation -- 7. The Contemporary Situation -- 8. The Problem of Progress -- 9. The Dialectic of the Individual and the Community -- 10. Conclusion -- Eleven/Is Philosophy a Guide to Life? -- 1. Philosophy: The Problematic Guide -- 2. The Problem of 'Applied Philosophy': Only One's Own Philosophy Can Provide Guidance -- 3. What Philosophy Per Se Can Contribute -- 4. Some Examples of 'Applied Philosophy' in the Public Domain -- 5. The Limited Utility of Methodological Applications -- 6. A Danger of 'Applied Philosophy' -- Notes -- Index of Names.