In contrast, our image of the astronomical universe, or even if earths geological history, ca easily be subject to revolutionary changes as new data come in and new theories are worked out. If we define the security of our image of various parts of the total system as the probability of their suffering significant changes, then we would reverse the order for hardness and as the most secure, the physical sciences as the least secure, and again the biological sciences as somewhere in between. Our image of the astronomical universe is the least secure of all simply because we observe such a fantastically small sample of it and its record-keeping is trivial records of biological systems. Records of the astronomical universe, despite the fact that we learnt things as they were long age, are limited in the extreme.
Even in regard to such a close neighbor as the moon, which we have actually visited, theories about its origin and history are extremely different, contradictory, and hard to choose among. Our knowledge of physical evolution is incomplete and insecure.
1.The word paradox (Line 1, Para. 1) means _____。
A.implication B.contradiction
C.interpretation D.confusion
2.Accroding to the author, we should reverse our classification of the physical sciences as hard and the social sciences as soft because _______.
A.a reverse ordering will help promote the development of the physical sciences
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