J.M. Keynes's method in the A Treatise on Probability, inexact measurement and approximation using non additive upper and lower probabilities, is a formal, inductive logic built on G. Boole's original Boolean Algebra and Logic. It has nothing to do with "…a given list of possible behaviors....

J M Keynes rejected Ramsey's subjective theory of probability in general. He did accept Ramsey's betting quotient approach in the special case where the weight of the evidence, w, equaled one so that all the probabilities were linear, additive, precise, exact, definite, single number answers. In...

Keynes made it clear to Townshend in their 1937-38 exchanges that Townshend's assessment, that Keynes ‘s theory of liquidity preference in the General Theory was based on Keynes's non numerical probabilities and weight of evidence(argument)analysis from the A Treatise on Probability, was...

The claim that Keynes's non numerical probabilities are ordinal probabilities was shown to be mathematically impossible by Keynes in chapter 15 of the A Treatise on Probability on pp.162-163 and in chapter 17 on pp.186-194.Keynes's non numerical probabilities are identical to Boole's constituent...

Keynes's logical, objective, relation of probability, P(a/h)=α,where α is a degree of rational belief, has nothing to do with truth or falsehood. Probability is not truth. The belief that a probability, expectation or expected values can be true (false) appears to involve the same kind of...

The mathematical(logical), technical, theoretical exposition of the multiplier given in chapter 10 of the General Theory by Keynes is identical to the exposition given by Keynes in chapter 26 of the A Treatise on Probability in footnote 1 on page 315. The mathematical theory requires that the...

Keynes's 1931 acknowledgement, that Ramsey's theory of subjective degree of belief, based on numerically precise probability, was acceptable to him in the special case where w=1, has been constantly misinterpreted. This misinterpretation follows from the lack of understanding of Keynes's weight...