Hey all, I found videos for Embedded Conditionals in the V1 version of the course. They’re under the “Advanced Logic” subsection of the V1 Logical Reasoning section. (You need to go to the Syllabus page and then click “Switch to V1” for these links to work)

https://7sage.com/lesson/mastery-embedded-conditional/

https://7sage.com/lesson/mastery-embedded-conditional-proof

Watch those V1 videos and then read the V2 lesson to review and then this might be less daunting!

#feedback The link to the "Even If" construction for Q6 is broken.

In the meantime, I found this explanation of "Even If" on the PowerScore blog helpful!

https://blog.powerscore.com/lsat/how-to-handle-even-if-even-if-it-doesnt-matter/

That's mixing Sufficiency-Necessity

Decline -> Corrupt -> Revolution

Contrapositive: /Revolution -> /Corrupt -> /Decline

So you can only infer with the contrapositive that if qarth/Corrupt then => qarth/Decline. Meeting the Necessary condition gives you no information about the Sufficient condition.

I found this table on Google helpful! https://kkennyblog.wordpress.com/wp-content/uploads/2013/09/deductive_reasoning.png

What helped me understand Group 3 better was to substitute this for a more relatable condition like: "You will get cavities unless you brush your teeth."

Common Sense: Brushing your teeth is expected to prevent cavities. If you brush your teeth, you’re less likely to get cavities. If you don’t brush your teeth, you will get cavities.

Formal LSAT Logic: If you don’t brush your teeth, cavities will definitely occur. If you brush your teeth, cavities may or may not occur.

You can see why the "common sense" explanation is ultimately wrong compared to the "formal logic" even from a "common sense" perspective: if you binge eat bags of hard candy, drink 6-packs of soda, you might get cavities even if you brush your teeth. Even if the heat wave abates, someone might be cryptomining in their basement make-shift data center and short the electric grid, causing a blackout.

Group 3 only guarantees what will happen if the sufficient condition (Brush your teeth, heat wave abates) is NOT met. It doesn't tell you or guarantee anything else at all. This is why the sufficient must be negated to properly represent Group 3 translations.