Keynes’s probability: An introduction to the theory of logical groups

The present work is intended to be an informal introduction to the theory of abstract logi- cal groups. This particular formalization stems from some concepts of abstract algebra and the Johnson-Keynes’s theory of groups. Therefore the aim of this paper is that of provide the readers with the logical reasoning behind this brand new theory. I shall depict the philosophical notions as bases of the Keynes’s probability and then I shall explain it in terms of group. Furthermore we shall see, albeit roughly, a first definition of abstract groups.