Comp232 - Mathematics For Computer Science - Ali Moallemi, Iraj Hedayati - Concordia University Page 3
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18Exercise 4
What rule of inference is used in each of these arguments
a) Kangaroos live in Australia and are marsupials. Therefore,
kangaroos are marsupials.
Answer:
Simplification
b) It is either hotter than 100 degrees today or the pollution is
dangerous. It is less than 100 degrees outside today. Therefore, the
pollution is dangerous.
Answer:
Disjunctive syllogism
c) Linda is an excellent swimmer. If Linda is an excellent swimmer,
then she can work as a lifeguard. Therefore, Linda can work as a
lifeguard
Answer:
Modus ponens
Ali Moallemi, Iraj Hedayati
COMP232 - Mathematics for Computer Science
3 / 18
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