**Re: Primary commas still undecided**", dated: 7-Dec-2006 (so it's in between the two sets linked above). This is not the whole email. It's only the part relating to 25/11C and 11/49C.

>> Dave wrote: >>> I understand there is still some uncertainty about whether ~~| is >>> 11:25C or 11:49C at the super-olympian level. Is that correct? >> >> Yes, but I intend to show why we should prefer 11:49C (later). > > Hmm. How much _later_? Ummm -- okay, now (see below). > 11:49 does have wonderfully low slope and so > will probably be better for notating ETs. > > I guess that means poor old 11:25C gets the double right accented > symbol |~'' ? Yep. It boils down to this: Assuming that we're going to distinguish between the two (at the olympian level), then one of them gets ~~| and the other gets something else. Given a choice between |~'' and .)|~. for "something else", I think we would prefer the former. So which comma gets ~~| ? This is answered by looking at this several ways. 1) Compare the symbol & comma sizes: SoCA for |~'' is 17.377c 11:25C is 17.399c SoF for ~~| is 17.459c 11:49C is 17.576c Both symbols are closest to 11:25C, but |~'' is closer than ~~| to 11:25C, and 11:49C is closest to ~~| ; so ~~| gets 11:49C. 2) Use monotonic symbol cores as a tie-breaker: Assuming that the 36th mina will be split halfway between 11:25C and 11:49C (at 17.488c), then |~'' must be either above or below that boundary, and ~~| will be opposite. Putting |~'' below the boundary maintains a monotonic symbol core sequence with |~, so |~'' gets 11:25C. 3) Determine what's most needed for ET notations: Many divisions (e.g., 388, 742) have 11:25C and 11:49C as the same number of steps, so ~~| can represent both commas in those divisions. However, where the number of steps differs, the number of steps for 11:25C will usually agree with 23C (for 311, 441, 525, 653, 665, 935, but not 795; also cf. 207, 301), so if ~~| is 11:25C, then there will be very few opportunities to use the ~~| symbol, since we would probably prefer |~ . Using ~~| as 11:49C would not only allow more opportunities to use that symbol, but would also make it possible to associate |~ with both 23C and 11:25C (remembering that this amounts to dropping the double-right accent from the 11:25C symbol) in those instances.

My response the next day had subject heading: "

**Forget the justification, just give me super-olympian**", which pretty much says it all. I accepted George's recommendation on the matter.

But as we see from the 2007 email linked from the previous post, nearly a year later George decided to unsplit the 36th mina, so only one of 25/11C and 11/49C required a symbol.