I present here a cluster of problems concerning contents, or propositions, which exercised the founding fathers of Analytic Philosophy, following in the footsteps of a distinguished tradition traceable back to Plato’s later dialogues. Their gist is this: what is it that holds the constituents of a proposition together? As presented here, in the current dialectic about this venerable problem there are two opposing sides. The first side comprises those who strive to provide reductive, substantive accounts. At the other end, we find those who think that this is an unwarranted aspiration, as manifested by the unsolvable puzzles, of their own making, that the reductivist proposals generate.

Keywords: propositions, representational acts, unity of propositions, predication.