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is that if A, then not B, and A or B, but not both the same thing?is that if A, then not B, and A or B, but not both the same thing?
To keep it simple, the biconditional requires A or B to be in, but not both. The not both rule could have both out. You can think of it in terms of max out -
what are you wearing on monday?are you studying to the last minute and showing up in your pajamas? treating this like the olympics and wearing athletic gear complete with sweat …
@asaunders2010 just remember no hats or hoods on your head during the test...
per lsac:
"hats/hoods (except religious apparel) may not be worn on the head" -
Question on contrapositive for some and iffHi all! So I need some clarifications...! Please help! Contrapositive for "some" doesn't exist because it's reversible. A <-s-> /B (Some A …
... doing so would not create a logical sentence that is equivalent ... and doing so would create a logically equivalent sentence.
& ... /> The contrapositive of a b becomes /b -> /a AND /a -> /b ... , and not /b -> /a OR /a -> /b?????? Isn't the ... -
Question on DeMorgan’s Law TheoryAccording to DeMorgan's Law Theory, And becomes Or when contrapositive. Correct? Then, I wonder why A if and only if A (AB = A->B AND B->A) bec…
"If and only if" is a biconditional statement
AB ( ... " or "or" in the sufficient or necessary condition.
Ex. A **or** B ... ---> C
becomes
C ---> A ... -
Is today Grey Day? [YES!!!]Creating this thread to quell some of the anxiety. ;) Will be updated when it's actually Grey Day. Feel free to chat here about it.
I know they said there is no rhyme or reason, he is from Indiana and I am from Texas. -
contrapositive of A or B but not both... Clarification plzI understood "A or B but not both" as one of the followings: 1. A(O) B(X) 2. A(X) B(O) 3. A(X) B(X) Then what is the contrapositive of it? …
Actually! FYI for anyone who came into see this question... you can't apply both rules! Use only one of the rules to apply and the remaining variable simply becomes negated!
.
.
Therefore, A or B but not both
= /A ---> /B -
contrapositive of A or B but not both... Clarification plzI understood "A or B but not both" as one of the followings: 1. A(O) B(X) 2. A(X) B(O) 3. A(X) B(X) Then what is the contrapositive of it? …
... ; .
> .
> Therefore, A or B but not both
A or B but not both" = /A B, A /B.
The negation of the conditional statement is A ... -
contrapositive of A or B but not both... Clarification plzI understood "A or B but not both" as one of the followings: 1. A(O) B(X) 2. A(X) B(O) 3. A(X) B(X) Then what is the contrapositive of it? …
... is:
A or B
-This means one of A or B has ... both is telling us either A or B has to be selected ... /> A or B: /A---->B; contrapositive /B---->A
not both of A or ... B : A---->/B; contrapositive B---->/A ... -
When doing Parallel flaw...Do you focus on finding the flaw in the argument and then matching that to an AC? Like any other flaw q, just instead of naming it you find another e…
... as "If A then B, We have a B therefore A" or it could ... be as difficult as "ABC therefore A ... of argument forms is not a panacea to every parallel flaw ... of the conclusion and add a "maybe" or a "probably" when our original ... -
How many pp tests to take in total?How many PT in total are we generally advised to take, prior to the actual exam? I will finish the core curriculum soon and will have about one month…
... questions in which there is no general or right answer that fits ... have taken each PT 2x or more. Some people only take ... -
A logic questionis it logically valid to conclude that if A-->B, then A+C -->B? I am reviewing S3 Q19 from PT 51. The correct AC seems to mobilize this reasonin…
... then you know that BOTH A and B together are ... if it's A OR B, then either A or B or both are sufficient ... necessary condition. The premise states A-->B so it doesn ... specific instance, if we get A, B, C, D together. ... As long as we get A, we know that B must ... -
Prep Test CHi y'all, Has anyone taken Super Prep PT C? I'm curious to hear what others think of the difficulty of this compared to others, specifically relev…
... remember my exact experience with A or C, but I know for ... a fact that PTB definitely felt ... -
When can someone "elicit a cause from a correlation"?So im going deeper and deeper into concepts and working on cookie cutters. Is there any situation where it would be appropriate to assume a cause fro…
... /> * A causes B
* B causes A
* Outside force C causes A or ... B or both (or multiple outside forces do ... two)
* A precedes B (or B precedes A) -- on a deeper level, typically ... -
Mistaking sufficiency for necessity vs mistaking necessity for sufficiencyI'm a bit confused about the technical differences between the errors of (1) mistaking sufficiency or necessity and (2) mistaking necessity for suffi…
... gives us:
A---->B
a sufficient necessary conflation ... /> concludes:
B--->A
or
A---->B
or BR PT 56.
< ... on with the appearance of a sufficient/necessary conflation on the ... -
Not both ruleIts skipping my mind right now, as I studied it before. But, in grouping games (not in/out) why do we use A -> ~B instead of A <-->~B for rules like …
... to remember that A /B indicates that either A or B has to ... be in.
>"A can ... , then I think diagramming as A /B is ok. But if ... , then I would diagram as A ---> /B. -
Struggling with a valid argument formIn the lesson [Valid Argument Forms 4 - 9 of 9](https://7sage.com/lesson/valid-argument-forms-4-9-of-9), a corollary to valid form 6 is introduced th…
... the domain which is a non-A and a non-B--but ... the universe is either an A or a B. However, I think ... which is a non-A and a non-B. Since "Non-A some ... But you are right in a way. The inference appears to ... assumption that set C is a _proper_subset of the universe ... -
Struggling with a valid argument formIn the lesson [Valid Argument Forms 4 - 9 of 9](https://7sage.com/lesson/valid-argument-forms-4-9-of-9), a corollary to valid form 6 is introduced th…
... that the C's constitute a non-trivial partition of the ... of assumption (that C, B, A, or anything else for that matter ... , is not a [universal set](https://en.wikipedia ... make this assumption results in [a contradiction](https://en.wikipedia.org ... -
December LSAT: Need help with logic games.Hello, I am going to be writing the December LSAT and I am having alot of difficulty with logic games. I have been drilling and improving my LR an…
... , i was at around -15. No a disaster would have to happen ... for me to score a -15 in LG section. LG ... -
December LSAT: Need help with logic games.Hello, I am going to be writing the December LSAT and I am having alot of difficulty with logic games. I have been drilling and improving my LR an…
... , i was at around -15. No a disaster would have to happen ... for me to score a -15 in LG section. LG ... now.
I had a similar experience. LG is now ... -
Allen goes to the park everyday except on days when Chris goes to the park.@aburk3 https://7sage.com/lesson/except/ JY says this conditional statement is a biconditional which is equivalent to "Allen is in the park if…
... will all this day Day A.
First we ... to the park on Day A."
We could ... at some point on Day A or he is not.
< ... but not both.
C¬A or A¬C could both represent the ... universal quantifier. It is a step we often do pretty ... -
Embedded Conditional vs DeMorgan'sIs there a difference between A --> (B-->C) vs A --> B or C If so, what is the contrapositive of the A --> (B-->C)
It’s different. A --> (B-->C) = A and B —> C
Contrapositive: /C --> /A or /B -
Application Timing Help - UVA LawHi all, I applied to UVA Law via their binding decision as of a few days ago. I am also currently registered to sit for the February 2018 LSAT. Curre…
... (3.67/167) there's no a good chance of being admitted ... get your score up to a 169/170, your chances will ... you are putting yourself at a great risk of being dinged ... them to wait before making a decision.
>
> ... -
Application Timing Help - UVA LawHi all, I applied to UVA Law via their binding decision as of a few days ago. I am also currently registered to sit for the February 2018 LSAT. Curre…
... (3.67/167) there's no a good chance of being admitted ... get your score up to a 169/170, your chances will ... you are putting yourself at a great risk of being dinged ... them to wait before making a decision.
> >
Help with "The Only"Hi everyone, I am on Lesson 17 of 59 in the Intro to Logic (under the Starter course). I am still not fully understanding how "the only" works. F…
... > Translation: If you are a kid with messy hair, then ... is "If you are a kid with messy hair, ... The reason for this is a little hard to describe ... hair be messy?
No, only kids with brown eyes ... br />
The answer is no. A kid with brown eyes can ...Negotiating aidHi all, if I am hoping to convince school A to give me aid by letting them know how much I got from school B, should I wait until school A’s financi…
... financial aid apps for school A, or else you risk sounding rude ... aid package, you can send a carefully worded respectful note about ...PT32.S1.Q11 - Many of the presidents and prime ministersHi! I'm practicing Must Be True/Most Supported questions and am having trouble with understanding why B is the correct answer as opposed to D. Answer…
... /necessity confusion. (D) is not a paraphrase of the stimulus.
A, B, and C can do ... to do _**something**_? No. A, B, and C together are ...Advice - June 2018 LSATI took the LSAT back in 2008-2009. I took Kaplan prep course which did not help in any way. The instructor was on speed and just assumed everyone un…
Yeah. There was no money or credit cards up front for the free trial. They only wanted that once I decided to buy in to the program.Score Breakdown for February?Not sure if this has been addressed already, I am aware LSAC does not release the February exam... but will we receive per section breakdowns at all,…
... />
"If there were no irregularities or special test circumstances, you will ...Logical negation question, am I understanding "some not" correctly?I just want to make sure I'm understanding the %s and #s correctly. Some...not means there exists 0-99% of the two ideas. Some dogs are not friendl…
All A are B.
Negation: Some A are not B.
No A are B.
Negation: Some A are B.
Some A are B.
Negation: No A are B.
Some A are not B.
Negation: All A are B.Struggling to grasp significance in negationSo I have a question regarding the rule used for negation ie 'All jedi use the force' is negated as 'some jedi do not use the force'. Wouldn't 'so…
... with percentages:
All A are B
100% ... (logical opposite of 'All A are B')
1 ... />
AND
No A are B
0% of ... A are B
Some A are B (logical opposite of 'No A ... are B')
1-100% of A are B
