Epistemology

The Critique of Pure Reason: Base Plan for Transcendental Philosophy

Outlines of Metaphysic

The Philosophy of Evolution

Ingersollia Gems of Thought from the Lectures, Speeches, and Conversations of Col. Robert G. Ingersoll, Representative of His Opinions and Beliefs

Luck, or Cunning, as the Main Means of Organic Modification

The Problems of Philosophy

Posterior Analytics

Theology's Epistemological Dilemma

Theophrastus and the Greek Physiological Psychology before Aristotle — On Sense Perception

The Logic of Hegel

First Principles

Leibniz's New Essays Concerning the Human Understanding: A Critical Exposition

Of the Conduct of the Understanding

Proslogion

On Sense and the Sensible

Discourse on the Method of Rightly Conducting One's Reason and of Seeking Truth in the Sciences

On the Philosophy of Discovery, Chapters Historical and Critical

An Inquiry into the Human Mind: On the Principles of Common Sense

Facts of Consciousness

Posterior Analytics