This will be the first in a (hopefully long) series of short notes about Choshen Mishpat. Our kehilla started a night program focusing on Choshen Mishpat today. I plan here to make some notes about things that strike me as interesting, confusing, or unclear.
Hopefully, one day, this will develop into a place for chiddushim and birurim. Until then, I plan to use it to store things that I want to make sure I go back to when I have enough information to actually have some answers.
Today's topic is on קניין כסף. According to the תורה, when a person wants to buy מטלטלין (any moveable object; i.e., not real estate), all he needs to do is pay for it. At the moment he pays, a קניין is effected, and the object (which he didn't touch, and may be located elsewhere) becomes his.
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