[Avodah] consistency?

[Rich, Joel]

Tosfot (munachot 11a S"V vrabbi shimon explains that when the gemara
says rabbi shimon doesn't doresh et here it really just means for the
drasha suggested by the gemara (to me implying he would use it for
something else; tosfot is forced into this because elsewhere we see R'
shimon does doresh etim).  Question- I find no other place in shas where
R' Shimon has a limud from this et, how do you understand this seeming
omission?
KT
Joel Rich
THIS MESSAGE IS INTENDED ONLY FOR THE USE OF THE 
ADDRESSEE.  IT MAY CONTAIN PRIVILEGED OR CONFIDENTIAL 
INFORMATION THAT IS EXEMPT FROM DISCLOSURE.  Dissemination, 
distribution or copying of this message by anyone other than the addressee is 
strictly prohibited.  If you received this message in error, please notify us 
immediately by replying: "Received in error" and delete the message.  
Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.aishdas.org/pipermail/avodah-aishdas.org/attachments/20080805/6bd1ed80/attachment.htm>