Under the standard picture, Deductions 5 and 6 together entail that if the one is not, then the one is F and is not F, which entails that it is not the case that the one is not.

One of the primary motivations for adopting the non-standard picture is that the standard picture makes it difficult to understand the second part of the dialogue as anything other than incoherent. The problem is this. On the standard picture, D1 and D2 together appear to entail that if the one is, then the one is F and is not F (and the one is con-F and is not con-F), and hence that it is not the case that the one is. Similarly, D3 and D4 together appear to entail that if the one is, then the