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What I found most interesting about this week's discussion on skyhooks and cranes was the idea of reality and fantasy, and the way these ideas can be linked. Critics, not just in biological evolution, but in all areas, are always trying to find faults. It is almost magical when we can provide these critics with a way to make skyhooks into reality. It stands for something deeper, I believe. When we can prove that the unbelievable ideas of evolution can exist in the realm of our understanding, we can perhaps gain faith in the idea of an ultimate Truth. And even if Truth is always a bit farther than we can grasp, it is reassuring to at least believe that it exists. This constant game of turning skyhooks into cranes is a constant justification of how amazing our world is.