"no dude, watch the Silva vs Mark Hunt fight. Silva did all you mentioned above: got side control, mounted, got the back"
I know, which is why it is ridiculous that the decision went that way.
I'm just pointing out Pride's officially stated scoring criteria. Unfortunately, they often ignore them.
They say time and time again that they judge the fight as a whole, use stopwatches to see how long each fighter is "winning", etc. But when it comes down to it, they more often than not give the fight to the guy who gets one knockdown (ignoring the other 15-19 minutes of the fight), or the guy who lands a flurry at the end (ditto), or the guy who gets more takedowns even if he doesn't pass guard (Henderson/Kondo).
Knockdowns aren't necessarily damage, anyway. These are big guys swinging. Hell, you can shove a guy to the ground. Unless the guy is really rocked,a knockdown isn't necessarily any big deal, and certainly shouldn't in and of itself decide the fight (Nog/Barnett, Henderson/Bustamante).