Master advanced reasoning techniques with this pivotal text on partiality, modality, and nonmonotonicity. Explore cutting-edge logic-based approaches to knowledge representation, ideal for handling incomplete information. This edited volume delves into foundational concepts like partiality and modal logics, alongside practical case studies on default reasoning, action, and automation. An indispensable resource for graduate students, researchers, and professionals in AI, computer science, and computational logic across India seeking to deepen their expertise in automated reasoning.