y in the very same giving
&gt; event.  The question, then, is whether, in such cases, we can 
&gt; correctly
&gt; say both (gives John Mary B) and (gives Martha Mary B).  My 
&gt; intuition is 
&gt; that we can.  But that is inconsistent with Fred's principle 1).

MW: You can choose to some extent. However, unless you choose that
one member of the relation = one giving event, I don't think you have
any way of being sure when two events involving some common object
 are part of different or the same giving e