In the present-day philosophy of mind, the abilities to reflect and to relate thinking to reality are subsumed under the heading of "intentionality." After an introduction to the questions and difficulties of the most relevant theories of intentionality, Stefan Kappner presents Charles Sanders Peirce's semiotic theory. He uses the semiotic concepts developed to gain systematic access to the skills of intentionality - by presenting a novel understanding of them as skills of interpreting signs. Taking constructive issue with present-day attempts at naturalisation, in particular with...