Hopefully someone can clear this up for me, because I am confused. Why is it that you have to do a full boil when doing AG but it is ok not to with extract? I understand that the full boil is just better all the way around to keep from having any nasties in top-off water, but just don't understand why it is necessary with one and not the other. After all, isn't it all wort once you are to the boiling phase? (Sorry, I did try searching, but had no luck) thanks