Shekalim 12: No Backsies, No Exchangies

One who consecrates all possessions with specifying what would be designated for what, then how should those possessions be handled? What if the person's possessions include animals that are fit to be sacrifices? (Spoiler: They'll be used as sacrifices). With a dispute between R. Akiva and R. Yehoshua - as to what happens with the sum total of the dedication. [Who's Who: R. Pappias] R. Pappias resolves the dispute, applying their respective views to two different cases. Also, swapping out a dedicated item for something else that will be more suitable, but it does not always work - What's What: Temurah.