Tag Archives: tractatus

On the Curious Calculi of Wittgenstein and Spencer Brown

Volume 6.10 of The Journal for the History of Analytical Philosophy (JHAP) has now been published online, with full open-access.

It features an article by Gregory Landini entitled “On the Curious Calculi of Wittgenstein and Spencer Brown”. Here is an abstract:

In his Tractatus, Wittgenstein sets out what he calls his N-operator notation which can be used to calculate whether an expression is a tautology. In his Laws of Form, George Spencer Brown offers what he calls a “primary algebra” for such calculation. Both systems are perplexing. But comparing two blurry images can reduce noise, producing a focus. This paper reveals that Spencer Brown independently rediscovered the quantifier-free part of the N-operator calculus. The comparison sheds a flood light on each and from the letters of correspondence we shall find that Russell, as one might have surmised, was a catalyst for both.

JHAP is a free, open-access peer reviewed journal. It is available at https://jhaponline.org/. Submissions welcome!

The Substance Argument of Wittgenstein’s Tractatus

Volume 4.7 of The Journal for the History of Analytical Philosophy (JHAP) has now been published.

It features an article by Michael Morris entitled “The Substance Argument of Wittgenstein’s Tractatus”. Here is an abstract:

In Morris (2008) I presented in outline a new interpretation of the famous ‘substance argument’ in Wittgenstein’s Tractatus (Wittgenstein 1922). The account I presented there gave a distinctive view of Wittgenstein’s main concerns in the argument, but did not explain in detail how the argument works: how its steps are to be found in the text, and how it concludes. I remain convinced that the interpretation I proposed correctly identifies the main concerns which lie behind the argument. I return to the argument here in order to elaborate in fuller detail the relation between those concerns and the actual course of the text.

JHAP is available at https://jhaponline.org. Submissions welcome!