John R. Searle, "Austin on Locutionary and Illocutionary Acts"

The distinction between locutionary acts (or, more specifically, rhetic acts) and illocutionary acts cannot be sustained. There are locutionary acts like "I hereby promise to come", which in virtue of meaning what they do, perform an illocutionary act. The locutionary act should be replaced with the propositional act, which is the expression of a certain proposition.