In the acquisition process, however, the role of demonstrative identification may be unclear. Nevertheless, a similar argument against SK can be formulated as long as some kind of empirical knowledge is needed to acquire the water concept. Indeed, it is typically assumed that a person acquires a concept from experience—which already portends that acquisition depends on empirical knowledge. Yet if that’s right, then even knowledge of (2) has an empirical basis, since possession of the water conce