If George graduated from the University after 1974, he was required to

Question

If George graduated from the University after 1974, he was required to take Introductory World History.

The statement above can be logically deduced from which of the following?

(A) Before 1974, Introductory World History was not a required course at the University.

(B) Every student who took Introductory World History at the University graduated after 1974.

(C) No student who graduated from the University before 1974 took Introductory World History.

(D) All students graduating from the University after 1974 were required to take Introductory World History.

(E) Before 1974, no student was not permitted to graduate from the University without having taken Introductory World History.

PTD1995 · Answer

George graduated after 1974, hence he took the Introductory World History course.

Pre-thinking: Logically, in 1974 there must have been an event that mandatory to take this course.

Answer D matches our pre-thinking

tinbq · Answer

Hi,
What is the type of this question? Inference or assumption or conclusion. Thanks

abs8 · Answer

to logically deduce is to infer, therefore it is an inference question .

vivek920368 · Answer

I understood the logic behind option D, but isn't option A is suggesting the same thing?
can someone differentiate the two?

Thanks.

VivekSri · Answer

See option A is a trap, and we easily tempt this option and mark the answer. Let us take an example :

If you will come office after 9:30 am, you will have to work one hour extra.

Now this doesn't mean that if you come before 9:30 am, you won't have to work extra, may be still, you have to work 60 min extra, may be not. So you can't confirm that if you come before 9:30 am, you will not have to work extra 1 hour. So what you deduce?

You can say with 100% clarity that those who come after 9:30 am, they will have to work 1 hour extra.

This is exactly written in D.

Hope you understand!

If George graduated from the University after 1974, he was required to

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If George graduated from the University after 1974, he was required to

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