Philosopher and cognitive scientist Daniel Dennett discusses his new memoir, I've Been Thinking, about the dominant themes of twentieth-century philosophy and cognitive science—including language, evolution, logic, religion, free will, consciousness, and artificial intelligence. Dennett's book, I've Been Thinking, is available for purchase now. Daniel C. Dennett is a philosopher, writer, and cognitive scientist. He is currently Professor Emeritus at Tufts University and the author of numerous books, including Intuition Pumps and Other Tools for Thinking, Breaking the Spell, Darwin's Dangerous Idea, and Consciousness Explained.