John Maynard Keynes 
Treatise on Probability [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It may be perceived that I have been much influenced by W. E. Johnson, G. E. Moore, and Bertrand Russell, that is ’to say, by Cambridge, which, with great debts to the writers of Continental Europe, yet continues in direct successionscience than of the creative to be understood.