Jon, List
I am now busy preparing slides for a Zoom talk on Feb 28, sponsored by Ontolog
Forum. (I'll forward a copy of the announcement to P-List, if anyone is
interested.) But first, I'll respond to some of your doubts.
JFS> The entire letter L376 is about Delta graphs and applications of
John, List:
I sincerely appreciate this clarification of your thought process
underlying your conjecture that "The primary subject of L376 is Delta
graphs." I am not yet persuaded, but I now intend to review the entire
letter carefully in light of your proposed interpretation. Again, on my
current
Jon,
The single most important innovation of Delta graphs is an operator for
metalangage or metalogic. Just that one operator, when added to ordinary
first-order logic, makes it possible to define a wide range of modal logics and
logics for probability. In fact, Peirce's modal logic of 1903 a