  Nonetheless our deductive inability is not seen as cause for ontological misgivings; there is no “money-matter” problem. All that we require is some general and less than deductive understanding of how economic properties and relations might be underlain by physical ones. Thus one might opt for a similar criterion for interpreting the How question and for what counts as explaining how consciousness might be caused or realized by nonconscious items. However, some critics, such as Kim (1987), have challenged the coherence of any view that aims to be both non-reductive and physicalist, though supporters of such views have replied in turn (Van Gulick 1993).