 Her second point is more intriguing: Jones objects to the regress argument’s conclusion that no real explanation of the meaning of denoting phrases can be achieved if we explain a proposition containing such a phrase with another proposition containing a phrase of the same form. Once again, however, the point is undeveloped. Nonetheless, it is implied that a categorical proposition can indeed be explained by another categorical proposition, so from the fact that p and q share the same form it does not follow that (e.g.) q fails to explain p (in the relevant sense of ‘explain’). (Recall that she takes all categorical propositions to possess the same form.) Echoing Jones’s sentiment, R. M. Sainsbury writes, “it is unclear what sort of explanation is needed, and why the circularity is vicious. This objection [i.e., Russell’s] must be regarded as therefore inconclusive” (Sainsbury 1979, 105). (Broad (1912) responds similarly.) Hylton (1990, 252–53), on the other hand, argues quite persuasively that there is a vicious regress here (Hylton’s remarks are concerned specifically with the passage in “On Denoting”, however).