Daily Drills 2 - Section 2 - Question 5

Identify the criterion for the correct answer choice in terms of true:Each of the following statements must be true E...

matthewgsmithok February 10, 2022

Clarification on Logical Opposite

I am still a little confused on this as well. It would seem that the logical opposite of "must be true" would be "must not be true." Could you clarify how not necessarily is the logical opposite? Thank you!

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Ravi February 10, 2022

The logical opposite of something includes anything that isn't what the original thing is.

If we look at truth on a scale of 0 to 100, we can assign not
necessarily true and could be true different values.

Must be true=100 (has to be true)
Not necessarily true (could be false)=0-99 (includes everything but
must be true)

Could be true=1-100 (includes everything except for cannot be true)
Cannot be true (must be false)=0 (has to be false)

The key difference between not necessarily true and could be true is
that not necessarily true includes cannot be true, whereas could be
true includes must be true.

Not necessarily true (could be false) means there's a chance that
something's false, but it does not have to be false

Could be true means that there's a chance that something's true, but
it doesn't have to be false

The logical opposite of "must be true" is "not must be true," which means the same thing as "could be false."

It must be true is 100 on the scale, could be false is 0-99.

Joseph September 30, 2022

I dont understand why we are looking for the logical opposite of "must be true." THe question doesnt ask for that anywhere. It asks for a criterion of true. Which, then, makes me wonder, how could something that "must not be true" be a possible criterion for true? How can something we know that cannot be true be true?

Emil-Kunkin December 23, 2022

Hi, the question is asking us what answer choice (if this were a real LR instead of a drill ) does not have to be true.

Gina April 29 at 10:50PM

This absolutely does not make any sense. I guess only to a crooked politician. They will make it work.