Cool thanks for the responses guys

Great video. Thanks for sharing!

I think the flaw can be described succinctly as one in which the experiment lacks a control group.

Yes thank you for doing this!

All direct proportionality means is that a change in one variable induces a change in another variable in the same direction (i.e. if X increases then Y increases or if X decreases, then Y decreases).

Does this give you any clarity?

Yes!! Thank you!

Hey thanks for the great advice. Could you elaborate on your method of scrapbooking? Do you have both an unmarked copy and then the analyzed version on a different page?

I'm jointly studying for the LSAT and GRE but the LSAT usually takes precedence.

I haven't studied for the quantitative section yet because my math skills are up to date (I am a tutor by profession).

For the verbal section, I've been using Manhattan Prep's essential and advanced vocab flashcards. There are 1000 words so going through those will take some time. I definitely recommending getting these. I've been studying the flashcards in tandem with a paid service called Membean, which uses periodic quiz questions to reinforce already learned vocab words. I'd recommend Membean but with some hesitation, though, as their modes of learning seem a bit too easy (I wonder about longer-term recall). One thing that I do really like is that they include the roots for every word to help you understand the relationships among different words.

I, too, wrote the premises G → FC ←s→ ACB but still got the question right. This diagramming also works in the same way as JY's subcategory method. The conclusion that ACB ←s→ G is invalid for the same reasons no matter the method.

The same argument made valid would have the premise FC → G instead of the G → FC as it is in the stimulus. This is where the necessity/sufficiency mix-up occurs. The valid argument would thus conclude ACB ←s→ G from

ACB ←s→ FC → G.

Key:

G: good actions

FC: favorable consequences

ACB: actions considered bad

I disagree with J.Y.'s emphasis on the correlation/causation flaw here. I agree that that flaw is present within the stimulus but I do not agree that that is the flaw that is paralleled (I don't think the correlation/causation flaw is present in AC (B)). Rather, I think the flaw that's being paralleled is one of overweighting/giving too much consideration to one factor at the expense of all others.

Wow this great! Thanks!

In case anyone is wondering, forms 1 and 2 have names:

Form 1 - denying the sufficient/antecedent

Form 2 - affirming the necessary/consequent

thanks!

Not a bad idea. Thanks guys

If you're struggling to ID the words when they first appear then flashcards may be useful.

If you're struggling understanding necessity vs sufficiency then practicing LR and LG may be the way to go. Diagram and try to understand on an intuitive level every conditional relationship you see.

I wouldn't get caught up in mastering conditional language right away. For me, understanding necessity and sufficiency developed over time. I struggled with the ideas for some time but constant exposure to the material improved my intuitive understanding. Personally, I would recommend not dwelling on the issue. I'd review the material and then move on, only going back to the lessons when other issues arise.

This discussion is really helpful!

That works too. Thanks!

Dave, with regard to the question you posted (51.1.20), I went through it and am not sure how it applies to the mistaking sufficiency/necessity for necessity/sufficiency distinction. Could you please elaborate?

cool thanks guys!

Awesome, thanks for your answers guys!

I too live in the South Bay but am willing to commute occasionally

I asked this question a while ago and the consensus was that diagramming on paper is a tool used rarely and only for the more difficult questions (under timed conditions). High scorers are able to diagram most questions mentally but sometimes are forced to do it on paper when the arguments are more convoluted.

I also like to close my eyes and take some deep breaths. Focusing on the rhythm of my heartbeat while taking the breaths helps immensely.