Several development packages in the Player's Guide refer to this particular Edge as a possible choice (Religious Upbringing, for instance, as well as some of the Rogue packages). However, I can't seem to find a description of this Edge anywhere in the book. Neither has a cursory scan of the messages here yielded any information. I can't find anything about it in that errata that exists.
Have I missed it? Has it been discussed here in the past and I just haven't found it yet?