Joanna Helena Szelegieniec

The debates about qualia are common in contemporary analytical philosophy, especially in the area of philosophy of mind or epistemology. Notwithstanding the significance of this notion in present-day investigations, there still appears to be a lack of agreement over how to understand the term “quale”. Due to this fact, our goal is to shed light on the concept of quale as it entered the modern history of philosophy. Strictly speaking, our concern shall be devoted to the American pragmatist philosophy of C. S. Peirce and C. I. Lewis. Therefore, we intend to outline the understanding of quale within Peirce's theory of categories at the beginning, and afterwards we shall present Lewis' remarks on quale in the context of his theory of the given. This approach will not only provide the grounds for relating Peirce's and Lewis' views with each other, but also it will let us interpret Lewis' notion of quale within the pragmatic framework.

HOW MUCH DO WE LEARN ABOUT HALLUCINATIONS FROM THOUGHT-EXPERIMENTS? The idea that our sensory experience cannot serve as a ground for knowledge lingers on within philosophical thinking from its very beginning. Since even the ancient sceptics argued against the possibility of knowledge based on sense perception due to its potentially illusory or hallucinatory character, it seems reasonable to address the issue of hallucination itself. The purpose of this paper is to discuss upon the philosophical account of hallucination present in current debates. I will mainly work on the so-called ‘argument from hallucination’ which provides a prevalent objection both against the direct realism theory of perception, and externalist theories of content of experience. My primary intention will be to single out the ontological claims concerning hallucinatory experience that constitute the core of the argument from hallucination. Moreover, the legitimacy of philosophical theses concerning hallucination will be discussed both by means of philosophical analysis, and in the light of chosen empirical findings.