Question 990738
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<pre>
  p   q    ~q   r    ~r    (p &#8744; r)   ~(p &#8744 r)    (~q &#8743; ~r)      ~(p &#8744; r) &#8596; (~q &#8743; ~r)
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  T | T  |  F | T  |  F   |    T    |     F     |     F      |             T
  T | T  |  F | F  |  T   |    T    |     F     |     F      |             T
  T | F  |  T | T  |  F   |    T    |     F     |     F      |             T
  T | F  |  T | F  |  T   |    T    |     F     |     T      |             F
  F | T  |  F | T  |  F   |    T    |     F     |     F      |             T
  F | T  |  F | F  |  T   |    F    |     T     |     F      |             F
  F | F  |  T | T  |  F   |    T    |     F     |     F      |             T
  F | F  |  T | F  |  T   |    F    |     T     |     T      |             T

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

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