Amud 68b

תוס' ד"ה מה

Just as slaughtering is immediately, so too selling is immediately - מה טביחה לאלתר אף מכירה לאלתר

Summary:
The immediacy of טביחה is usually delayed after sufficient time has lapsed so the owners are aware of the theft.

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תוס' ד"ה גניבה

Kidnapping will prove - גניבה בנפש תוכיח

Summary:
The inference from טביחה to מכירה was not based on a היקש.

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תוס' ד"ה רבי יוחנן

Rabi Yochonon maintains; his liability is both before Yiush and after Yiush - רבי יוחנן סבר חיוביה בין לפני יאוש בין לאחר יאוש

Summary:
Certain established rules regarding who is the accepted authority are valid only when we are discussing the original disputants (not when others are also involved).

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תוס' ד"ה הוא

He agrees with the virtuous ones - הוא דאמר כצנועין

Summary:
The צנועין and ר"ל maintain יאוש קני. The case of צנועין is a יאוש שלא מדעת situation. Only הקדש can be redeemed by anyone; other items requiring redemption need to be redeemed by the original owner. It is not clear why another cannot redeem these items on account of זכין לאדם שלא בפניו.

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