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A theory is either true or false. Galileo s observations of

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A theory is either true or false. Galileo s observations of [#permalink] New post 20 Sep 2005, 10:55
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A theory is either true or false. Galileo’s observations of Jupiter’s satellites showed that the Ptolemaic theory of the motion of celestial bodies is false. Therefore, since the Copernican theory of planetary motion is inconsistent with the Ptolemaic account, Galileo’s observations of Jupiter’s satellites proved the truth of the Copernican theory.

The argument above is open to the objection that it makes the uestionable assumption That

A. whoever first observed something inconsistent with the truth of the Ptolemaic theory should be credited with having proved that theory false

B. there are some possible observations that would be inconsistent with the account given by the Copernican theory but consistent with the account given by the Ptolemaic theory

C. the Ptolemaic and Copernican theories, being inconsistent, cannot both be based on exactly the same evidence

D. numerous counterexamples were necessary in order to show the Ptolemaic theory to be false

E. the Ptolemaic and Copernican theories, being inconsistent, cannot both be false


OA to be followed
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 [#permalink] New post 20 Sep 2005, 11:49
IMO E...
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 [#permalink] New post 20 Sep 2005, 11:55
E also. The point is, they can both be false, and the assumption that they cannot both be false is unreasonable.
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 [#permalink] New post 20 Sep 2005, 13:26
Another E. Same reasoning as CLF
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 [#permalink] New post 20 Sep 2005, 14:36
The answer is E

i would go with the same explantion as mr coffefreak!!
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 [#permalink] New post 20 Sep 2005, 15:01
IMO E
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 [#permalink] New post 21 Sep 2005, 01:02
Good explanation CLF

OA is E.
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  [#permalink] 21 Sep 2005, 01:02
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