Conditional Reasoning Diagramming Drill #2

[needtorockmyLSAT]

Hello!

I am having difficulties with drills on page 67-68 in the logic games bible regarding conditional reasoning. Specifically the questions that are using the Unless Equation are causing difficulties. I am wondering if you could provide me with an explanation of questions 2 and 4 and then I will attempt questions 9-12.

Question 2: G does not speak fourth unless Q speaks second.
My understanding: I read the statement as Q must speak second in order for G to speak fourth.
My diagrams:

Original: Q2 ----> G4 Contrapositive: Q4 (with a slash through it) ----> Q2 (with a slash through it)

Question 4: T dance sixth only if P dances fourth.
My understanding: I read the statement as P must dance third for T to dance sixth.
My diagrams:

Original: P3 ----> T6 Contrapositive: T6 (with a slash through it) ----> P3(with a slash through it)

Thank you in advance.

[Dave Killoran]

Hi Need,

Thanks for the questions! Many of the drills in the Bibles have been explained in further detail here, and in this case there is a great post on the topic of Unless and Problem #2 that I will direct you to. I believe it will solve all your questions, but if not just let us know!

The post is: LSAT Conditional Reasoning: Diagramming "Unless"

Please let me know if that helps. Thanks!

[needtorockmyLSAT]

Hi Dave,

It took me a little while, but I got it! In the unless equation I had been mixing up which side of the arrow the sufficient and necessary variables had to be on. Adding the "unless" in there threw me for a loop, but I've got it now. Thanks for your help!

[Dave Killoran]

Great! Good work on your part and glad we could help!