Q19

[ManhattanPrepLSAT1]

[steves]

Thanks--but I'm not following the inference trail that gets

FHMt > Kt

Since the 4th rule is -Kt > Ht + Mt,

I get -Ht or -Mt > Kt

[ohthatpatrick]

Are you asking about the work shown for answer choice (C)?

It says
Gs --> ~Mt --> ~(FHM)t --> Kt

It was really just a stream-of-consciousness shorthand.

I was thinking, from the 2nd to the 3rd idea,
"Oh, and if M isn't in t, then we're not in that world where FHM is in t, which means we're in the world where K has to be in t."

But, you're right, it's written in a confusing way. I didn't mean that ~Mt kicks all of F/H/M out of t. I was just trying to convey the "we're not livin' in that world" idea.

The much easier way to show why (C) is broken would be to just use the conditional chain we have at the top of our list of rules:
Gs -> Lt and ~Mt -> Kt