Abstract
We all seem to agree that everybody of us thinks about various matters, that all of us have all kinds of thoughts, and that it is precisely this thinking that makes a principal difference between us, humans, and other animals and things, which we can encounter within our world. However, what is a thought, how does it look like, and what it does? And how should we reach an answer to this question in the first place; is it a matter of empirical inquiry, or of something else (perhaps a phenomenological introspection)? In this paper we argue for the thesis that an empirical investigation of the mind (in contrast to the investigation of the brain) presupposes a conceptual analysis that is the domain of philosophy.