Sam Cohen asked:
How do we learn from the fact the Tanna adds the clause ve-zeh oimer kulah sheli (each says that "it is all mine") that with sight alone one does not acquire?
In other words, how do those words show that sight alone is insufficient?
Sam Cohen, Brooklyn, NY, USA
The Kollel replies:
Rashi (as explained in Shitah Mikubezes) says that the term "it is all mine" is used only if a person has physical contact with the item. The Ra'avad writes that one cannot clearly say "it is all mine" by sight alone for he cannot be sure that another did not see it.
D. Zupnik