No you cannot drink
winny. You have to hash it out into several straight lines on a mirrored coffee table and snort it using us currency rolled up as a straw. But, you cannot use any denomination lower than a twenty as it will break down the long esters in the
winny 
Ok, just so everyone knows and phreezer will back off, there is not now, nor has there ever been any confusion on my part as to the construction of the pectorial muscle.
Now, what about gains slowing after sticking with the same exercise over a period of time? I used to do only flat bench when I worked chest. I would do between 4 and 7 sets depending on how heavy I was trying to go. I made progress doing that for about a year or so, but then I just kinda quit making improvements. Mostly in strength, but also in size. Then I started mixing it up, and I started making improvements again real quick. For chest, I started doing 4 sets of incline, then 4 sets of flat, then 3 or 4 sets of some various fly movements. I don't ever max out, but on heavy days I'll do 4 really heavy sets of 6 reps. When I got stuck I was weighing about 185, and my heavy sets were about 225lbs. on flat bench. After another year of training like this I was up to 275lbs. Currently, I'm doing this with 355lbs (after implementing
AAS). I can do more for a couple sets but I have to drop for the last one or two. And I'm still able to keep my lean body weight a touch over 200lbs! (I'm not wanting to add anymore mass, only strength, and symmetry if it is possible)
Anyway, this was the training philosophy that Arnold, Franko, Lou, and Zane all subscribed to and that Arnold testifies to in his Encyclopedia of Modern Bodybuilding. And it worked for me, so it can't be all bunk.
To me it seems that claiming full muscle development can be had with only one movement (decline bench in this case), is the same sort of claim that would say a smith machine bench press is just as good as a barbell bench press. I've always thought it understood that machines that lock you into one motion did not allow for full muscle fiber stimulation. And that is where I'm hanging up on the idea that I should just rely on one essential movement to take care of all my pectorial development needs.
I understand the postition, I just would like a little more explanation on how only one movement is necessary for total pectorial development...