Which of the following statements shows that the statement above is not true?

Question

All sophomores are now 16 years old.

Which of the following statements shows that the statement above is not true?

a Tim is a senior who is 18 years old.

b Sheng is a junior who is 16 years old.

c Elida is a sophomore who is 16 years old.

d Dennis is a sophomore who is 15 years old.

e Luis is a freshman who is 15 years old.

Answer 1

The statement states: All sophomores are now 16 years old, the only students you need to look at are the sophomores, that limited to option C and D. However, Option D states Dennis is a sophomore who is 15 years old.

Therefore, Option D shows that the statement above is not true

Answer 2

d.

if a sophmore is 15, then it's false that all sophmores are 16

b almost makes it false too. if a junior is 16, then she was 15 as a sophmore, but that doesn't deny that all sophmores NOW are 16