  Let us recall Weyl’s statement that one can’t ask alibis of electrons.  Dalla Chiara and Toraldo di Francia refer to quantum physics as ‘the land of anonymity’, in the sense that, on this view, the objects cannot be uniquely labelled (1993 and 1995). They ask, then, how can we talk about what happens in such a land? Their suggestion is that quantum objects can be regarded as ‘intensional-like entities’, where the intensions are represented by conjunctions of intrinsic properties. The extension of the natural kind, ‘electron’, say, is then given by the collection of indistinguishable elements, or a ‘quaset’. The theory of such quasets then gives the possibility of a semantics for quantum objects without alibis (ibid.).