 Contemporary acquaintance theorists have defended more sophisticated versions of the view. In response to the first problem, the acquaintance theorist can agree that in order to be justified it is not enough that the subject be acquainted with a fact that happens to correspond to what is believed. It will be useful to divide the responses into two broad camps, introduced in the next two sub-sections: those that require, in addition to acquaintance with some fact, some sort of awareness of the correspondence between the thought and what it is about (or perhaps awareness of some other epistemically relevant relation—see the end of  section 6),  and those that require that the beliefs involve demonstrative or phenomenal concepts. 