Two aspects of propositional unity

The paper builds upon familiar arguments against identifying the proposition that Brutus stabbed Caesar with a given sequence containing Brutus, Caesar, and the stabs relation. It identifies a further problem, one that affects not only traditional Russellian accounts of propositions, but also the recent act-theoretic approach championed by Scott Soames and Peter Hanks. The problem is that there is no clear content to the idea that the pair < Brutus, Caesar> instantiates the stabs relation. It is argued that this further problem presents a decisive objection to the act-theoretic approach to propositions.