Maciej Sendłak

The article outlines the main motivations for the Guise Theory and its intriguing theses concerning identity, predication, existence, and fiction. The second part of the article is devoted to an assessment of Castañeda’s theory. It discusses the most influential critiques of the Guise Theory, as well as Russell’s objection to theories of nonexistent objects. The last section of the article contains a comparison of the Guise Theory with the Meinong’s Theory of Objects, and points out that despite various similarities, we should draw a distinction between original and moderate versions of Meinong’s theory. The main motivation for this distinction are differences between accounts of predications, which allow us to call the Guise Theory “quasi-Meinongian” rather than just “Meinongian”. This is because one of its main claims is taken from the work of Meinong’s pupil Ernst Mally, and not from Meinong himself.

In 1947 Quine wrote one of the most important and influential articles in the twentieth century philosophy - "On What There Is". One of the aims of this article was a critique of Meinong's Theory of Object. The critique was especially focused upon nonactual possibilities, which (according to Meinong) are some kinds of nonexistent objects. In my paper I want to present Neo-Meinongian refutations of Quine's critique. In order to do this I discuss: (i) the main thesis of "On What There Is" ,(ii) premises of Meinongian Theory, (iii) views of proponents and opponents of the idea of nonexistent objects, (iv) Quine's critique aimed at nonactual possibilities, (v) Terence Parsons' theory, based on the distinction between nuclear and extranucler properties, and (vi) noneism, defended by Richard Routley. I also try to give a reply to the most popular critiques aimed at both Neo-Meinongian theories. The main conclusion is that Quine's critique and his arguments against nonactual possibilities aren't dangerous for theories endorsing Meinong's Theory of Object. Contrary to what Gilbert Ryle once claimed (If Meinongianism isn't dead, nothing is), Meinongian theories are still alive and doing well

The subject of this paper is the notion of similarity between the actual and impossible worlds. Many believe that this notion is governed by two rules. Ac-cording to the first rule, every non-trivial world is more similar to the actual world than the trivial world is. The second rule states that every possible world is more similar to the actual world than any impossible world is. The aim of this paper is to challenge both of these rules. We argue that acceptance of the first rule leads to the claim that the rule ex contradictione sequitur quodlibet is invalid in classical logic. The second rule does not recognize the fact that objects might be similar to one an-other due to various features.