The Logic Structure of Pictorial Representation Paul Crowther We use the term »representation« in many different contexts. Danto tells us, for example, that the word Icarus »represents« Icarus; Goodman mentions, in passing, that an ambassador represents his country; pictures represent, maps represent, it is also said that photographs represent. Now what tempts us to group all these together initially, is the fact that they all involve a semantic function. Even in the case of the Ambassador, we are entitled to invoke this function marginally insofar as his activity is a presentation of his country's as opposed to his own interests. His authority ultimately »refers back« to the powers that granted it. It is the semantic function which has thence led Goodman to assert that denotation is the »core« of representation. This core has a twofold character. On the one hand a representation as in the case of portraiture, can embody a genuine two term relation - there is a picture, and there is a person who the picture is »of«. On the other hand, there are pictures which involve only one term - the picture itself, insofar as their subject-matter - Mr. Pickwick or Pegasus or whatever, are fictional entities. A clarification of the relation between one and two term picturing, has I think to be the foundation of any coherent theory of representation. However, we immediately face a crucial problem. We have found that repre- sentation is used synonymously with »stands for«, »refers to« or in Goodman's case »denotes« i.e. variants of semantic function. But we characteristically associate representation, not with just any old semantic function, but one where the representation perceptibly resembles the subject it is denoting. I mean of course, such things as pictures, maps and photographs. These, we might claim, are the classes of artifacts which give the term »representation« its ontological potency. It is clear then, that an investigation of representation must take as its central task, the clarification of »resemblance« and its role in the context of one and two term representations. Now by far the most impressive treatment of this whole area is found in Flint Fit. vest. /Acta Phil., XV (2/1994), 199-198. 200 Paul Crowther Schier's Deeper into PicturesHis basic approach deals with it in terms of a theory of »natural generativity«. The basic outlines are as follows: »Pictorial competence in a symbol system is the ability to generate naturally interpretations of arbitrarily many novel members of the system. When an initial interpretation ofsome symbol does in fact effect an ability in someone to interpret novel symbols without further ceremony, then that initial interpreta- tion was iconic or pictorial, the symbol so interpreted was a picture.«2 Schier's point here is that picturing is a mode of communication, which, once learnt, is decisive. To recogniseXas a picture of>> in the most basic sense does not require anything in the way of further ad hoc conventions. Any new picture we encounter draws on natural abilities to recognise similarities be- tween it and that which it pictures. Interestingly, however, whilst this clearly involves some question of resemblance, it is the »recognition« aspect which Schier gives massive emphasis to. We are told in this respect that »... the theory of natural generativity is soaked in causation. Essential to that theory are two causal claims' that an interpretation of S as being of 0 is iconic or pictorial in so far as it has been prompted by the interpreter's 0 - recognising abilities and that a picture of 0 is precisely something which can trigger the interpreter's O-recognising abilities. Iconic interpretation and iconicity are thus functionally defined, e