לזכות ידיד נפשי הרב מאיר זאב שטיינמעץ שליט"א
והחברותא שלו ידיד נפשי הרב משה אהרן פולייב שליט"א
והחברותא שלו ידיד נפשי הרב משה אהרן פולייב שליט"א
The gemara [Bava Metzia 9a] asks that if a person is riding an animal, he should be able to thereby acquire not only the animal through his act of riding - which is a kinyan meshicha - but also the halter [מוסירה] through this kinyan meshicha. So why does the Braisa say that he only acquires the animal while the person who is holding on to the halter acquires the halter [with a kinyan hagbaah]? See Tosfos ד"ה ונקני.
But wait!!
According to the gemara's conclusion, they both acquire the halter together, for each made a half a kinyan on it and the rule is מיגו דזכי לנפשיה זכי נמי לחבריה . But that would mean that the rider made a kinyan meshicha while the person holding on to the halter made a kinyan hagbaah. You can't make a joint kinyan with two different kinyanim- half meshicha, half hagbaah!! So what is going on here??!
In the words of Rav Moshe Aharon Poleyeff:
