Two brothers are both surgeons. They are skiing in the Alps one snowy day. They are both overly cautious and carry the same basic tools of their trade whenever they ski. Coincidentally, both brothers acquire the same injury. One performed the required procedure in treating the injury and got safely down the mountain while the other died, however both acquired the same injury and carried the same tools. Why was one able to stabilize his injury and make it down the mountain, yet the other could not?
This question has a lot of possible answers. Here's one off the top of my head:
The injury made them both lose a lot of blood, and they each required a blood transfusion. With nobody else around, one of the brothers had to draw blood from the other, and hence only the one that got the transfusion lived, while the other died.
Or how about this:
You never said the brothers were skiing TOGETHER in the Alps. One brother was only 50 m from base camp and was able to limp back, while the other was on the peak and couldn't make it.
@Te55eract it is mentioned in your question that
One performed the required procedure in treating the injury and got safely down the mountain while the other died, so only one brother performed the procedure in treating the injury and that's why he was able to stabilize his injury and make it down the mountain while the other could not