User blog comment:PsiCubed2/Does anybody here know the expansion rules for BM2?/@comment-35470197-20180709144339/@comment-30754445-20180709184706

There's that word again: "guess".

Why can't the original author come forward and give us a rule set? And why do people even bother with a notation whose author refuses to give us a concise definition for?

This is just plain surreal.