 conveys information about the function of the •triangle•, namely, that its use (in Euclidean contexts)entitles one to a •has angles summing to two right angles•.  Similarly, Sellars interprets fact-talk as material mode metalinguistic speech about truths.  The only things to which we are ontologically committed by the use of abstract singular terms are linguistic items: specifically, expression-tokens that participate in complex causal systems which involve, inter alia, normatively assessable interactions between language users and the world.  In Sellars’s reconstruction of it, talk of abstract entities does not have explanatory force, but is involved in making explicit certain linguistic norms.