Fulfilling the mitzva of Megila with a wandering mind by by Rabbi Benzion Halberstam of Lakewood

I received this letter today

There are lots of Rabbanim today who tell their people that you can't be yotze Megilla with just hearing it in Shul because your mind naturally gets preoccupied with stray thoughts so they require various complicated ways in order to be yotze and they say that otherwise you aren't yotze. In response to this, a Rav in Lakewood wrote a teshuva saying that this isn't true and that even if the person's mind thinks about other things during Krias Hamegilla he is yotze. This teshuva was put out on tables in some shuls this Shabbos and it seems very convincing.

   Megilla