User talk:Inthar/MV3

Counterexample - XYZZY

There is a flaw in this argument somewhere because I have a specific counterexample.

Let's consider the MV3 scale XYZZY (verifying that this is indeed MV3 is a simple exercise).

If we discard the X, the result is YZZY which is not a MOS - so this is a counterexample to what you're trying to show. I believe (along with its repetitions such as XYZZYXYZZY) it's the only counterexample.

The contiguous run of Y'z and Z's, YZZY, does not have the interval 2Y in it, but if you consider the whole scale with the X removed, 2Y does appear. So the logical flaw is somewhere in the "scooting" part. —Keenan Pepper (talk) 18:34, 22 April 2021 (UTC)