"Rookie question...I see in just about every recipe for brats, or just about every other kind of sausage, you’re supposed to add water/beer or some sort of liquid. "
Chris....if you don't ask the questions, you'll forever be a rookie :-) I've always believed, and enforced with people that I've been a manager for over the years, that the only dumb question is the one you don't ask.
Prior to starting my hobby of sausage making, I read reams of information, from here and from several of the country's top sausage makers. The common thread among all of the information sources is that there are three primary ingredients in sausage: meat, fat, and liquid. From there it's a matter of which meat(s) you use and your spices. I add liquid (beer, ice water, etc) a little at a time while mixing until the meat starts to slurry, as stated by Dave above. The meat has the correct moisture content when you can take a gob of it, stick it to the palm of your hand, turn your hand over, and the meat sticks. You can reach this point without adding moisture but it'll mean mixing the meat until it's completely emulsified...in essence turned into pate'. At this point, you have "broken" the farce and lost all textural integrity. Some meats (like bologna) are meant to be prepared this way but not most of your mainstream sausages. Keep asking the questions and you'll learn more here than you ever imagined possible....and be prepared to expand into many other avenues of home prepared meats. Once you get comfortable with sausage making you'll gain confidence to start into other things, any of which you can find the methodology for here in SMF. This is a great place to call home :-)
Hoping to help a bit,
Robert