[Avodah] lo plug

[Eli Turkel]

<<AIUI "lo plug rabanan" doesn't mean that the rabanan *can't* make
distinctions, but that they don't have to make every distinction that
could conceivably be made.  When they make a takanah they can build
exceptions into it, if they think of them and think it appropriate to
exclude them, but at some point they can decide "OK, no more exceptions
to this rule, we're done", and one can't then come along and make ones
own exceptions.  But for this to apply there has to have been an actual
takanah, where they could have made (more) exceptions and chose not to.>>

The question was not the right of chazal to make exceptions.
Rather the question had two parts
1. Is there any rule when they do or not
2. Rishonim and Achronim frequently do distinguish between cases and
sometimes say lo plug - again how do they decide
the case I brought was candle lighting on Yom Tov - does the woman make the
beracha before lighting unlike shabbat. Wife of the perishah makes the
distinction while Magen Avraham says lo plug
what is the basis of the machloket?

-- 
Eli Turkel