DY – Even though this is addressed to hello99 & I’m not 100% sure what you are talking about -let me take a crack at it.
“I don’t think it’s much of an extrapolation or dochek. The R’ma clearly assers the food b’dieved if it was heated after having cooled, although it’s pretty clear to me that you’ll be stuck without (hot) food.”
Again this was done as a L’chatchilla, not as a B’dieved! (They arranged this in the git -go.) Chazal would never be Matir – Ameira L’acum for s/o who always put himself in this Matzif! Once it’s cooled -you don’t have Ain Bishul etc., anymore.
“I think these halachos (chazara, bishul) are more chamur than the case of the Itur. Besides the sevara that we must be more machmir for food, your being neheneh directly from his maaseh (the food itself was cooked by him) which might be worse than using the lamp he turned on.”
There is no difference between one D’oraysa and another, no matter what you say. Sitting in a lit room is having Hanaah!
“What is your alternative? That the R’ma would allow full-fledged bishul al y’dei aku”m when you have no other cholent, but asser food even b’dieved when it was reheated after being nitztanein?”
Exactly, because one is a case of Tzorech Godol & one isn’t!
We seem to be going round & round with this. If you are Oiver a Shvus -it’s Ossur Kdei Sheyaseh. If it’s a case of Tzorech Godol -it pushes off the Shvus!