<description>Stronger theorem at end of "Infinite Data and Proofs" chapter; in "Reasoning About Equality Proofs" chapter, more discussion of axiom avoidance and tactic pitfalls for JMeq; general passes through "Proof Ssearch in Ltac" and "Proving in the Large" chapters; in "Universes and Axioms" chapter, a class of baffling error messages explained; comments added to CpdtTactics.v.</description>
<description>Stronger theorem at end of "Infinite Data and Proofs" chapter; in "Reasoning About Equality Proofs" chapter, more discussion of axiom avoidance and tactic pitfalls for JMeq; general passes through "Proof Search in Ltac" and "Proving in the Large" chapters; in "Universes and Axioms" chapter, a class of baffling error messages explained; comments added to CpdtTactics.v.</description>