Argues that a set is the mereological whole of the singleton sets of its members (following Lewis's Parts of Classes), and that the singleton set of X is the state of affairs of X's having some unit-making property.

Logical Atomism is a philosophy that sought to account for the world in all its various aspects by relating it to the structure of the language in which we articulate information. In _The Philosophy of Logical Atomism,_ Bertrand Russell, with input from his young student Ludwig Wittgenstein, developed the concept and argues for a reformed language based on pure logic. Despite Russell’s own future doubts surrounding the concept, this founding and definitive work in analytical philosophy by one of the world’s (...) most significant philosophers is a remarkable attempt to establish a novel way of thinking. (shrink)

Facts, I am pleased to observe, are back in fashion. For some time now they have had staunch friends in the American Midwest, and these days they are embraced as far afield as Sydney and San Francisco. But what are facts, and what facts are there? My answer to the first part of this question, which I shall not pursue further, is the same as Russell’s and the early Wittgenstein’s: Facts are what constitute the objective world, and what make true (...) sentences and thoughts true and false sentences and thoughts false. But what is the nature of the relation between facts and truths whereby the former make the latter true? This is the central question of my paper. I naturally do not claim to give a full and adequate answer to it, but only to present some considerations which tend to favour one type of answer over another. The main burden of the paper is to show that it is in principle neither necessary nor desirable to admit negative, molecular, and general facts in order to allow for an adequate account of making true. (shrink)