correct! this is called the contrapositive.
p->q ≡ ~q->~p
I will leave it to you to prove the identity with truth tables.
(a) translate the argument into symbolic form and (b) determine if the argument is valid or invalid. You may compare the argument to a standard form or use a truth table.
If Nicholas Thompson teaches this course, then I will get a passing grade.
I did not get a passing grade.
∴ Nicholas Thompson did not teach the course.
3 answers
Do it yourself.
a swimming pool is built as follow;
the top view is a rectangle 12ft by 30ft. the pool is 4 feet deep at the shallow end and 9 feet at the deep end. the sides walls are as shown. how many square ft of tile will it take to tile the two side walls and both end walls?
the top view is a rectangle 12ft by 30ft. the pool is 4 feet deep at the shallow end and 9 feet at the deep end. the sides walls are as shown. how many square ft of tile will it take to tile the two side walls and both end walls?
2 answers