2055

[tbwturn]

The question and answer is as follows:

Zhu is selected unless Jim is selected, and if Jim is selected then Klara is selected.

We can infer that. . .

Correct Answer - If Zhu is not selected then Klara is selected

Incorrect Answer - If Jim is selected then Zhu is not selected

I was stumped by this because both answers seem correct. My logic on the incorrect answer is as follows:

The statement begins with, "Zhu is selected UNLESS Jim is selected". Therefore, if Jim is selected, Zhu is not selected.

Why would this be incorrect?

[maryadkins]

The question and answer is as follows:

Zhu is selected unless Jim is selected, and if Jim is selected then Klara is selected.

So we'd diagram this:

No Jim --> Zhu

No Zhu --> Jim

And the second part would be:

Jim --> Klara

No Klara --> No Jim

Jim then not Zhu isn't how you interpret "unless" statements. It's not an inference. Can you review the Unless section of the Logical Reasoning Strategy Guide or some other resource? It's worth putting the time into understanding how to interpret Unless statements as logical sentences...then this will make more sense.

However (but again, I strong suggest you study up on this beyond this simple rule), the quick explanation is that "unless" is like "if not." So the first sentence could be read as "Zhu if not Jim." This is why it's: No Jim --> Zhu.