Question 198712
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Let *[tex \Large p]: Today is Friday.  Which means that *[tex \LARGE \~p]: Today is not Friday]


Let *[tex \Large q]: Tomorrow is not the day to go shopping.


*[tex \LARGE \ \ \Rightarrow\ \] means If (whatever is in front of the arrow) then (whatever comes after the arrow)


So:


If tomorrow is not the day to go shopping (*[tex \Large q]), then today is not Friday (*[tex \Large \~p])


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ q  \ \ \Rightarrow\ \ \~p]


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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