Question 975440
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Your argument is just a couple of premises without a conclusion.  It has no validity because it is incomplete.  Had you concluded FF from ~S and ~S -> FF, then you would have a valid conclusion by Modus Ponens.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \