Unlike time - to - exhaustion tests, a TT provides an externally valid model for examining how an initial work rate is chosen and maintained by an athlete during self - selected exercise. (link.springer.com)
By your own admission, we simply don't have enough data to verify past weather... or climate conditions rendering it impossible to say how valid the models actually are. (illconsidered.blogspot.ru)
If in fact, all 5 land use forcing runs are really valid model outcomes, it tells us that climate models don't have the often claimed property of «eventually forgetting about initial conditions.» (climateaudit.org)