Question 1062819
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Both are valid.


First argument:  The first premise is irrelevant.  But even if there are many shades of gray about your feelings about physics, "like" physics is only one of those shades, and "do not like" physics is all of the other shades, but "do not like" clearly excludes "like".  Hence the statement "You like physics" following the premise "You do not like physics" would be false.  ~p -> ~(~~p)


Second argument:  The same logic applies, except that you don't have the problem of considering the "shades of gray" issue since the first premise defines only two possible feelings about physics; like or don't like.  Again, the statement "You do not like mathematics" following the premise "You do like mathematics" would be false.  p -> ~(~p)


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
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