Here 's a class they probably didn t offer in your school (although maybe you did some independent studying of the subject.) Here, in nontechnical language, is the real story of what 's going on in that bucket, that carboy, and that bottle. Does every brewer need to know the chemistry behind beer? No. Will it help ever brewer to become a better brewer, to understand where those annoying off-flavors come from, and to make tastier beers? If you answered yes, then go to the head of the class.