This is the second of two 90-minute Q&A sessions given by Leonard Peikoff during the course, Objectivism: The State of the Art. Topics covered in this session include: how to properly apply the method of integration; why Ayn Rand, in her later years, wrote philosophical essays and cultural commentary rather than a systematic treatise on Objectivism or more fiction; what distinguishes thinking in principles, thinking essentials and thinking in fundamentals; what can — and cannot — be demonstrated philosophically about consciousness; how the various virtues, as concretizations of rationality, form an integrated unity.