deriv LSK ETT STT aSTA ALPH OLDHOMEPAGE NEWHOMEPAGE
The fundamental dogma of /pANini exegesis is:
Nothing in the sUtras serves no purpose.
Watered-down version of the same:
When a student, using what appears to be sound reasoning, concludes that any piece of any sUtra serves no purpose, the chance that the student's reasoning has holes is well above 90%.
What if no one can find the hole, not even the learned commentarists?
Then /pANini screwed up.
Does that actually happen?
Well, yes, it does. Saying it directly has been sort of a taboo for about two millenia, however.