MARKING A SEFER WITH YOUR FINGERNAIL - PART TWO
SEIF 5 (Cont.)
The Magen Avraham quotes the Bach who forbids marking a Sefer with a fingernail, because such a notch, if it would last a long time, would cause a person to be Chayiv. Therefore, one might assume that even though it is known that the mark will not last, it should at least be considered an Issur D'Rabanan The Elya Rabba quotes the Levush who says that even if the mark would be long lasting, the person would still be Pattur from a Chatos, since he is not writing a letter. This argument hinges on a Machlokes in the Mishna. The Rabanan say that one is not Chayiv for marking in such a fashion, only for actual writing. R' Yose holds that one is Chayiv for marking, even if the marks do not form letters.
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