GWD T-3-Q32 请教诸位

TinyBar

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 questionable 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.

答案是E，不知道是不是我理解错了，我认为本题是找削弱项，选择了C，即不一致的P和C理论不基于同样的事实，因此G的观察不能证明C是否正确。请指点下，多谢。

prayer

这是一个假设题，虽然你看到了 questionable assumption。但是以前有个牛牛说，所有的假设都是存在问题的。

所以还是假设题。

prayer

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 questionable 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.

答案是E，不知道是不是我理解错了，我认为本题是找削弱项，选择了C，即不一致的P和C理论不基于同样的事实，因此G的观察不能证明C是否正确。请指点下，多谢。

-- by 会员 TinyBar (2009/12/23 16:03:31)

A证明了B是错的，C与B是矛盾的，根据文章中的第一句A theory is either true or false.那么C和A肯定是一样的，要么false，要么true。