[Avodah] Kashrus and Shabbas

[rabbirichwolpoe at gmail.com]

Rn Chana 
> and since a safek d'orisa is a d'rabbanan,

This itself is a machlokes rishonim... 

> It is in true Rav 
> Ovadiah style.

> He does note that various modern poskim (Tzitz 
> Eliezer, Rav Moshe) disagree with him regarding cooking on a shabbas 
> platter, but he feels they are creating new gezeras, and that we cannot do 
> this.

I wonder how many times ROY says that "they are creating new gezeras,
and that we cannot do this."?

It seems common if not ubiquitous! 

First of all who says applying an existing g'zeira to a new situation is
ipso facto a "new" g'zeira? It seems even ROY understands shema yachta
to extend to electric controls!

Second of all, who says g'zeiros cannot be introduced? Afaik Any S'yag
can be added on -- especially if somewhere down the chain a d'oraisso
is protected EG: as in Bishul or Hav'ara on shabbos.

[EG See AhS YD siman 90 re: k'chal] 

Caveat: A gzeira to fence a d'rabbanan only would indeed be different:
EG eruvin, Hanukkah, n'tilas yadayim.

KT 
RRW 
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