 On the implicit proviso that \(k\) is empty (that is, tautologous: \(k = \top\)), Hempel (1943, 1945) himself had put forward (EC) and (SCC) as compelling adequacy conditions for any theory of confirmation, and devised his own proposal accordingly. As for (CC), he took it as a plain definitional truth (1943, 127). Moreover, Hempelian confirmation (extended) satisfies all conditions above (of course, for arguments \(h\), \(e\) and \(k\) for which it is defined). HD-confirmation, on the contrary, violates all of them. Let us briefly discuss each one in turn.