Empty Reference
We seem able to talk about things that do not exist, such as centaurs, Oliver Twist, and the highest prime. But the axiom of existence tells us that we can refer to something only if it exists, since reference is a relation. What, then, is it to which we refer in the case of non-existents? Various proxy referents are dismissed since they will either trivialize statements about non-existents or give implausible theories of meaning. Instead, we should think of our statements as being about non-existents instead of referring to them where this involves only a pretended referring. We can distinguish pretended reference from unintentional reference failure by the factive component required for genuine reference. Aboutness can be a substitute for reference and, if based on a public theory of meaning, it allows us to talk about what does not exist.