Jeff, In the note I just sent, I was talking about the version of EGs in L231. For that version of logic, there can be no difference in semantics between a scroll and a nest of two ovals. JBD> In the case of inductive and abductive inferences, the conditionals may take a variety of forms: epistemic, alethetic, deontic, etc. In each of these cases, the topological character of the relations may vary. I agree. People who adopt EGs for classical FOL may need to extend the notation for other kinds of logic. Since Peirce dropped the scroll in 1911, anyone might choose to adopt it for some new purpose. But it's important to emphasize that the new purpose would not be identical to anything Peirce had previously written -- unless (and this is a big UNLESS) they could prove that it was indeed identical to what Peirce had previously intended. John
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