To refute the solipsist or the metaphysical idealist all that you have to do is take him out and throw a rock at his head: if he ducks he's a liar. His logic may be airtight but his argument, far from revealing the delusions of living experience, only exposes the limitations of logic.
There is no shortage of water in the desert but exactly the right amount, a perfect ratio of water to rock, of water to sand, insuring that wide, free, open, generous spacing among plants and animals, homes and towns and cities, which makes the arid West so different from any other part of the nation. There is no lack of water here, unless you try to establish a city where no city should be.
...I would like to introduce here an entirely new argument in what has now become a stylized debate: the wilderness should be preserved for political reasons. We may need it someday not only as a refuge from excessive industrialism but also as a refuge from authoritarian government, from political oppression. Grand Canyon, Big Bend, Yellowstone and the High Sierras may be required to function as bases for guerrilla warfare against tyranny. What reason have we Americans to think that our own society will necessarily escape the world-wide drift toward the totalitarian organization of men and institutions?This may seem, at the moment, like a fantastic thesis. Yet history demonstrates that personal liberty is a rare and precious thing, that all societies tend toward the absolute until attack from without or collapse from within breaks up the social machine and makes freedom and innovation again possible.
Looking out on this panorama of light, space, rock and silence I am inclined to congratulate the dead man on his choice of jumping-off place; he had good taste. He had good luck - I envy him the manner of his going: to die alone, on rock under sun at the brink of the unknown, like a wolf, like a great bird, seems to me very good fortune indeed. To die in the open, under the sky, far from the insolent interference of leech and priest, before this desert vastness opening like a window onto eternity - that surely was an overwhelming stroke of rare good luck.... He would not have suffered much after that; he may have died in his sleep, dreaming of the edge of things, of flight into space, of soaring.