February 1994 LSAT Section 2 Question 22

If O is selected for the first Sunday, which one of the following is a concerto that must also be selected?

balde_kadija@yahoo.com on July 26 at 06:50AM

I don't understand how it's possible to have O without having J

Rule #2 states M -> NOT J & NOT O, correct? With this being an in/out game, I took that to mean that J and O must always be together, whether they are both in or both out...the reason being that if M is chosen then J nor O can be chosen AND if M is not chosen then J and O must be chosen in order to avoid either J or O being in the same category as M. Can someone please explain to me what I'm missing?

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Emil-Kunkin on July 30 at 10:33PM

The rule is that if M is in J and O must be out. This tells us nothing about what happens if m is out. It's possible that if m is out then both j and o are in, that only one is in and the other is out, and that they're both out. J and O are not a block, there's no issue with M being together with either J or O in the out category, only with them being together in the in category.