the other thing, two things that almond son had that was different from scott, almond son grew out of this idea of worrying what can happen, had productive pair know, i can't it was a pair know i can't that is very productive, he would put three times the amount of buffers in his supply depots in case they needed them coming back, scott would calculate what he needs and put wx and put bag. >> he would put one flag, so if he misses that is bad, almond son would put black pennants for ten-kilometer target, yo could get a little bit off course, so you have got to build buff buffers and contingencies, in our companies, carry three to ten times the amount of ch to assets of other companies? why, just like almond son, you might need them,and the only mistakes you can learn from are the ones you survive. then the other thing that almond son had is that his whole approach to coming up with his strategy was deeply empirical. scott, bet on motor sledges he was going to out innovate the south, south pole they had not been empirically validated in that environment in those conditions, the engine