One Hundred Years After Keynes Published His a Treatise on Probability in 1921, Edgeworth’s Two Reviews Still Stand Out As Being Vastly Superior to the Assessments Made by Any Other Economist : All Heterodox Economists Reject the Unanimous Conclusion, Made by All Philosophers, That Keynes Hinted at or Suggested or Had a Notion About an Interval Valued Theory of Probability in Chapter III of the A ...

F Y Edgeworth made the only correct assessment of Keynes’s Logical Theory of Probability, as presented in his A Treatise on Probability, among economists in the 100 years between 1921 and 2020. The reason is that he actually read the entire book with the exception of Part II, which he was able to assess through his very careful reading of Part I.The major problem confronting any economist, who wants to take into consideration the various different aspects of Keynes’s A Treatise on Probability ,is the unfortunate fact that there is no economist, with the one exception of Edgeworth, who has read beyond chapters 1-4, plus some parts of chapter 6 of the A Treatise on Probability. This includes practically every heterodox economist who has written on Keynes’s A Treatise on Probability, such as R. Skidelsky, D. Moggridge, R.O’Donnell, A. Carabelli , V. Chick, S.Dow, G.Meeks, J.B.Davis, A. Fitzgibbons, E.R Weintraub, J . Runde, T. Winslow, C. McCann, Jr., T .Lawson ,G. Fioretti, P. Davidson, D. Dequech,and many more.The conclusion reached is that after 100 years there is only one path currently available to economists who want to know what it was that Keynes actually accomplished in the A Treatise on Probability-read and reread the two reviews made by Edgeworth. Such a reader is then in a good position to grasp what it was that Keynes had erected in 1921-the first mathematically and technically advanced interval valued approach to probability in history. The economists’ claim that Keynes’s discussions in chapter III of the A Treatise on Probability were only about Keynes’s alleged ordinal theory of probability directly clash with the conclusions of every philosopher who has written on the A Treatise on Probability, since all philosophers support the conclusion that Keynes was suggesting or hinting at the use of an interval theory of probability in Chapter III of the A Treatise on Probability