Typo?: Page 150, LG Strategy Guide

[iabney]

For Drill #, 5 is there a typo here? In addition, does that typo affect the directionality of the arrows?

For this drill question, my variables were:

X..> Y
contra: -Y..>-X

but the drill answer says the correct answers are:

X..>-Y
Y..>-X

If I am indeed wrong, can you explain to me what "only if" stands for on Binary Grouping games? In my notes I have that "only if = then," but that may be for LR only.

thank you

[timmydoeslsat]

For Drill #, 5 is there a typo here? In addition, does that typo affect the directionality of the arrows?

For this drill question, my variables were:

X..> Y
contra: -Y..>-X

but the drill answer says the correct answers are:

X..>-Y
Y..>-X

If I am indeed wrong, can you explain to me what "only if" stands for on Binary Grouping games? In my notes I have that "only if = then," but that may be for LR only.

thank you

Only if does introduce a necessary condition. Logic is logic, regardless of it being a logic game or a logical reasoning problem.

I am looking at #5 right now on page 150, and although I do not personally use the logic chain for binary games, this set up is correct.

If X(V) ---> Y(S)

So I know that if Y(V) ---> X(S)

Please tell me what you believe the chain is saying.

[iabney]

Thank you for putting the logic chain into English for me. I realized the volleyball/squash binary was throwing me off, I was so focused on the "in/out" dichotomy. I need to test myself on jumping between "in/out" games and " one or the other" games. Thanks again!