Will have to respectfully disagree with you guys a bit on that.
For me, It's a basketball thing. You can't measure a team's "G-ness" or "Mental Fortitude." That's a romanticized way of looking at sports, not just basketball. It really doesn't play out like that, In my opinion at least. Those terms are great for TV, great for people to come to grips with whats happening, but its a lazy and often times innaccurate assesment of what's going on. We as fans aren't psychologist, and you can't tell what mental state a player is in just from watching him for a period of time on TV for the most part. For instance the Clips won game 4 in SAS, Won game 6 in SAS, then won Game 7. Then without CP they almost take the first two games in Houston. How can they have mental fortitude then, but all of a sudden not have it in games 5-7? I just don't know how to assess "mental Fortitude."
It's flat out basketball man. You win and lose with your role players. When Matt Barnes is giving you 20 points in a game 7, and Austin Rivers is going off for 16 on the road in SAS, things like that you win. When they don't, you lose. The difference in the play of the role / support players from games 1-4 to games 5-7 is largely why we lost that series. Blake and CP do have to be better in the 4th quarter, but they have to be better at basketball things, not something mythologized like "Mental Fortitude." Staying discipline and running your sets to get good shots in the 4th, Doc Rivers rotations in the 4th, whether or not you play Pierce and Crawford together in the 4th, these are things that they need to get better at and to me that isn't "G-ness" it's simply basketball.