Study Guide Eruvin 15 Today's daf is sponsored by Elisha Gordan in honor of his mother, Shifra Vega for her hospitality and chizuk learning the daf alongside him during corona. A post that was already standing and not placed with the intent to be a post, does that work? Rava and Abaye disagree. The gemara assumes they would also disagree about the same issue regarding a mechitza but later reject this assumption. Sources are brought to support Abaye's position. Can an animal function as a post? Can one write a get, bill of divorce, on an animal? What works as a mechitza? If the wall is more breached than standing, it does not. What if it is equal?