[Avodah] V'sain Tal uMatar, Precision in Halachah

[rabbirichwolpoe at gmail.com]

In an offlist dialogue we discussed how precise analogies must be
in halachah

For a highly imprecise analogy, consider that we use the Babylonian
"yardstick" for v'sein tal umatar all throughout the golah even though
we are only "Bavel" by not being EY! Our agricultural climate is very
different

[Same for keeping the highly obsolete nusach of Yekum Purkan which refers
anachronistically to Bavel.]

We are "Bavel" in a sense, but in an imprecise sense. 

I made a hilluq hypothesis:
To preserve a status quo, an imprecise analogy might work.

OTOH to make a hiddush might indeed require a higher-level of precision
in the analogy.

GS
RRW
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