  On the other hand, as the Revisionist will point out, the Theaetetus does not seem to do much with the Forms that are thus allegedly introduced. But perhaps it would undermine the Unitarian reading of the Theaetetus if the Forms were present in the Digression in the role of paradigm objects of knowledge.  For the Unitarian reading, at least on the version that strikes me as most plausible, says that the aim of the Theaetetus is to show that, in the end, we cannot construct a theory of knowledge without the Forms—a claim which is to be proved by trying and failing, three times, to do so. So if the Forms were there in the Digression, perhaps that would be a case of “giving the game away.”