On the Propositionality of Signs

Abstract: There has been much philosophical debate about whether the meaning of pictures can be analysed using theoretical frameworks normally employed within philosophy of language. A specific question within this debate is the question of whether pictures can express propositions. Instead of addressing this question in of pictures in a broad sense, this essay focuses on a specific category of pictures referred to as pictorial signs. These signs constitute a pictorial form of communication that we use in our everyday lives. The question of whether pictorial signs can express propositions should, because of this communicative use, be more approachable than the same question applied to pictures in general. While a standard approach to the question has been to investigate the extent to which pictures may share some syntactic or semantic features with natural language, the approach in this essay is instead to look at how pictorial signs are used. The suggested strategy is to approach the question of propositionality by attempting to translate a particular sign into some sentence in natural language on the basis of how the sign is used, rather than analysing its structure.