Keynes's initial, introductory presentation of his inexact measurement, approximation approach to interval valued probability occurred on pages 38-40 of chapter III of the A Treatise on Probability. Keynes used a simple diagram on page 38 to illustrate the non linear and non additive nature of...

A major error ,committed by all philosophers and economists in the 20th and 21st century who have written on the 1931 comment of Keynes on Ramsey about “…I yield to Ramsey, I think he is right”, is their failure to recognize that Keynes’s logical theory of probability is an imprecise...

By the time that Keynes’s logical theory of probability appeared in 1921 in his A Treatise on Probability (1921), Keynes had already used it in his Indian Currency and Finance,1913, personally at the Treaty of Versailles negotiations as the official representative of the British Treasury...

Sraffa made a number of margin notes in chapter 17 in his copy of the General Theory .Contrary to Joan Robinson’s 1978 claim ,that Sraffa had uncovered logical and mathematical errors in Keynes’s liquidity preference theory of the rate of interest when he generalized his theory in chapter...