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Imagine just for a moment that you’re in a party of 100 people setting off to climb a high and distant mountain. You have no satellite imagery. You have no relief map of the mountain, nor much in the way of information on its shape, other than what you can see at a distance from one side. You certainly don’t know where the gullies are, you don’t know where the rivulets are, the glaciers, the impenetrable cliffs. Well, one sensible approach might be something like this: you would all break up into different parties and approach the mountain from different sides. Some of you, perhaps, would try approaching the north face, others might try the south col or the northeast ridge.