Members: 
 
     What, in the History of Economics, corresponds to proof in an 
empirical social science?  
 
     Which is not to imply that the History of Economics cannot be 
empirical; nor to imply that, as practiced, the History of Economics 
is empirical.  Nor are the opposites implied.  The answer, of course 
make entail such implications. 
 
     The simple question remains.