Sorry to thread drift but . . . I've been considering getting a pair of half ropes for alpine/ice for conveinience of rappel and weight (i.e. using only one for simple glacier travel). But a few questions come to mind: (1) if you're only clipping one rope at a time, and therefore falling on one rope at a time, technically shouldn't one rope be able to hold a fall. (2) Isn't clipping one rope of a half easier than two twins? (3)Also, is it remiss to clip both half ropes to a biner (negate impact force benefit or something)? It seems that if you're running it out - as most of us seem to do on ice - you would want both ropes running through the draw.