Question #3

[slabby]

N will be selected only if J is selected.

Answer options:

1. ~J -> ~N

2. ~N -> ~J

As I understand it, the rule for "only if" is basically a double negation and the removal of the "only". So it becomes "N will not be selected if J is not selected". or the second answer.

The game seems to think the first one is the correct answer, not the second. I'm confused.

[slabby]

Ah, nevermind. I forgot the old switcheroo.

A if B being equivalent to if B, then A.

N will not be selected if J is not selected is really

if J is not selected, then N will not be selected.

[tommywallach]

Glad we were here! : )

-t