On 3/20/2019 11:37 AM, g...@gnusystems.ca wrote:
I thought a Medad was (by definition) a graph with no loose ends.
NEM 3:164 (or p. 4 of eg1911.pdf) says "A graph or graph instance having 0 peg is a Medad." There are many places were Peirce says that a line of identity, by itself asserts "Something exists." Don Roberts (p. 47) discusses this point in some detail, and cites some references. Since a line of identity is an EG and it has 0 peg, it's a medad. Roberts (p. 48) discusses many EGs that have a line with one loose end. In eg1911.pdf, Fig. 1 for There is something that is not a phoenix" has one loose end for "something". It's also a medad because it has no unattached peg. John
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