Expecting eyeball to throw an error on disjoint classes

Hi again!
I'm using eyeball and the vcard ontology to make sure it throws errors on
things like disjoint classes. the problem is that while the vcard ontology
says that the classes "individual" and "location" are disjoint, eyeball
doesn't bat an eye (sorry, couldn't resist) at:

<http://example.com/me/corky> a vcard:Individual, vcard:Location;

Any tips would be very much appreciated!