Fundamental Uncertainty and Plausible Reasoning: Introduction ; S.Marzetti & R.Scazzieri Logic, Empiricism and Probability Structures; H.Kyburg The Weight of Argument; I.Levi Inductive Intuition; V.Fano A Theory of Similarity and Uncertainty; R.Scazzieri Generalized Theory of Uncertainty: Principal Concepts and Ideas; L.Zadeh The Weight of Argument and Economic Decisions; A.Vercelli The Relevance Quotient and Probabilistic Equilibrium; D.Costantini & U.Garibaldi Non Self-Averaging Phenomena in Macroeconomics: Neglected Sources of Uncertainty and Policy Ineffectiveness; M.Aoki Induction and Atomic Universe: A Critical Reorientation of Keynes's Economic and Philosophical Thoughts; I.Hishiyama Uncertainty and Rationality: Keynes and Modern Economics; J.Kregel & E.Nasica Moral Good and Right Conduct: A General Theory of Welfare Under Fundamental Uncertainty; S.Marzetti