First slide
Introduction to mathematical reasoning
Question

If p, q, r and s are four simple statements, such as
p: The school bus will come
q: I go to school
r:  I shall meet my friends 
s : I shall go out for a movie,
then the compound statement, 'If the school bus does not come or I l will not go to school, then I shall
meet my friend and go out for a movie. is "represented by

Easy
Solution

(If the school bus does not come) v (I will not go to school)
 (I shall meet my friend) ^ (I shall go out for a movie) 

     (~p)(~q)(rs)    ~(pq)(rs)  (De-Morgan's Laws) 

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