4.5/5 because brain fog on #1 where I said ICSA (I can see Arun) rather than ICNSA (I can not see Arun). Was moving too fast 🫠 but I caught it after re-reading
If you make flashcards with the individual indicator words on one side and the type of conditional on the back, and just keep practicing with those, you will gradually start to internalize them to the point where you don't even think about it. It's great practice while watching TV or something!
Does the order of the first and second statement matter as long as both premises are there?
For example, question 2 my A statement is "over 40 -> /ski" and my b statement is "ski -> /over 40". The answer given gave the same statements in the opposite order, is there any functional difference between the two?
5/5! next steps would be to find a more reduced and simple way to notate the predicates of the sentence. for example, with Q2, i said "over 40 --> /learn to ski" while the example said "over 40 --> /want to learn to ski." i'm not sure how important the distinguishing of these more complex subjects will be in the future, but it's probably better to be more specific than not?
@LastLivingLily0 Its all about if you can keep track of the symbols. For example, I did 40—>/S - I was able to keep track of this because one mentioned 40 and the other mentioned skiing. If you can keep track of it without using more words I would imagine that would be more helpful. However, if you need more words to remember each condition, don’t hesitate to use as many words as you need. It is all about how you personally work best.
@Omarrah I wondered the same thing at first, but it actually is a valid contrapositive. The earlier examples can make it seem like one term must be negated while the other remains unchanged. However, that's not how contraposition works.
Think of it this way: a negated term is a minus sign (−), and a non-negated term is a plus sign (+). Similar to algebra, when a term moves to the other side of an equation, its sign changes. With contraposition, when a statement switches sides of the arrow (→), its negation status flips.
So, in Questions 1–2, one term is negated (−) and the other is not (+). When you take the contrapositive, they switch sides and both signs flip, resulting in + and −.
In Questions 3–4, both terms are non-negated (+ and +). When you take the contrapositive, they switch sides and both become negated (− and −).
The key rule is that when forming a contrapositive, you reverse the direction of the statement and negate both terms. Whether a term ends up negated or not depends on whether it was originally negated before the switch.
Random question; Do you folks prefer trying to use a unicode shortcut for an arrow sign (IE., "Option + 2192" on mac to make a '→') or do you prefer to make it simple and just use two hyphens and a 'Greaterr than' sign? (IE., '-->')?
For #2, I understand the idea, but why is it flipped so the second part comes first: /not want to learn to ski → over 40, and then want to learn to ski → /over 40? In the other examples, the answer is pulled from the 1st part of the sentence rather than the second part.
@AlexisBeam I tripped up on this one as I thought it wasn't conditional but a fact trying to trick us. "all trees" after reviewing it I see my error but it defiantly got me.
Shouldn't the contra positive of #3 be "if people are not buying OR using less then things do not cost more"? Shouldn't the "and" be swapped to "or" when taking a contra positive?
Original Sentence: I would not be able to see Arun if he were in the next room.
Modified Sentence: If he were in the next room, then I would not be able to see Arun.
Sometimes you need to flip the order of the clauses in a conditional sentence. Think of IF → THEN like a math equation. The sentence has two parts: X and Y.
X is the condition, so it always goes in the “if” part of the sentence.
In this example, “if he were in the next room” is X. Since X is the “if” part, you put it first.
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288 comments
4.5/5 because brain fog on #1 where I said ICSA (I can see Arun) rather than ICNSA (I can not see Arun). Was moving too fast 🫠 but I caught it after re-reading
If you make flashcards with the individual indicator words on one side and the type of conditional on the back, and just keep practicing with those, you will gradually start to internalize them to the point where you don't even think about it. It's great practice while watching TV or something!
4/5, question 3 threw me off. I mistook less of them for a negative indicator. I see now why that does not make sense.
I struggled with this. Had to watch twice.
Number 5 got me. I didn't identify the 2 concepts and the modifier. Now I see why it's important. That was a good trick question.
@ChelsiSmith SAME LOL
Does the order of the first and second statement matter as long as both premises are there?
For example, question 2 my A statement is "over 40 -> /ski" and my b statement is "ski -> /over 40". The answer given gave the same statements in the opposite order, is there any functional difference between the two?
@Aubrey.Raile To my understanding, no. The contrapositive functions exactly the same so writing the original or contrapositive first shouldn’t matter.
It may be important if the question is specifically asking you to identify the contrapositive or vice versa, but otherwise they are exactlly the same.
@BenWillGold okay perfect, thank you!
5/5 yippee!
kinda getting it wooooo
5/5! next steps would be to find a more reduced and simple way to notate the predicates of the sentence. for example, with Q2, i said "over 40 --> /learn to ski" while the example said "over 40 --> /want to learn to ski." i'm not sure how important the distinguishing of these more complex subjects will be in the future, but it's probably better to be more specific than not?
@LastLivingLily0 Its all about if you can keep track of the symbols. For example, I did 40—>/S - I was able to keep track of this because one mentioned 40 and the other mentioned skiing. If you can keep track of it without using more words I would imagine that would be more helpful. However, if you need more words to remember each condition, don’t hesitate to use as many words as you need. It is all about how you personally work best.
The mid sentence "If" is karmatic.
I fumbled on no 5 :(
#5 almost got me!
why don't you negate and provide a contrapositive for #4?
@Omarrah I wondered the same thing at first, but it actually is a valid contrapositive. The earlier examples can make it seem like one term must be negated while the other remains unchanged. However, that's not how contraposition works.
Think of it this way: a negated term is a minus sign (−), and a non-negated term is a plus sign (+). Similar to algebra, when a term moves to the other side of an equation, its sign changes. With contraposition, when a statement switches sides of the arrow (→), its negation status flips.
So, in Questions 1–2, one term is negated (−) and the other is not (+). When you take the contrapositive, they switch sides and both signs flip, resulting in + and −.
In Questions 3–4, both terms are non-negated (+ and +). When you take the contrapositive, they switch sides and both become negated (− and −).
The key rule is that when forming a contrapositive, you reverse the direction of the statement and negate both terms. Whether a term ends up negated or not depends on whether it was originally negated before the switch.
for question 3, isn't "or" the contrapositive of "and"?
What purpose do the parentheses serve?
Random question; Do you folks prefer trying to use a unicode shortcut for an arrow sign (IE., "Option + 2192" on mac to make a '→') or do you prefer to make it simple and just use two hyphens and a 'Greaterr than' sign? (IE., '-->')?
@ManusWeber -> is my go-to. I only use one hyphen to make things as simple as possible.
5/5 lessgetit
For #2, I understand the idea, but why is it flipped so the second part comes first: /not want to learn to ski → over 40, and then want to learn to ski → /over 40? In the other examples, the answer is pulled from the 1st part of the sentence rather than the second part.
@isabellagirjikian
"if" indicates the sufficient condition so "he were over 40" goes first since it directly follows "if"
over 40 -> /want to learn to ski
Then the last step is to do the contrapositive so all you do is flip it and switch the / (not) to the other side.
Want to learn to ski -> /over 40.
IE
if you don't really know this, you won't really master LR.
/understand --> /master LR
master LR --> understand
___
understand --> /worry about the test
worry about the test --> /understand
For #5. Is it okay if I thought about it as IF and THEN?
@AlexisBeam I tripped up on this one as I thought it wasn't conditional but a fact trying to trick us. "all trees" after reviewing it I see my error but it defiantly got me.
@AlexisBeam Yes, but be sure to double check and understand the relationships when you see words like all, some, every, each, any, many etc.
I made flash cards to help memorize group 1-4 conditional indicators, thought I’d share in case it would be helpful to anyone else. I’m redoing this course after getting through most of it and taking the lsat and not doing as well as I hoped. Looking back I realize how important it is to know these. https://quizlet.com/1153975729/lsat-7sage-conditional-indicators-to-share-flash-cards/?i=71yhg9&x=1jqY
@Elideebeep Thank you so much!
@Elideebeep Thank you
@LindaLopez of course!
@Kamillechernandez599 no problem!
Shouldn't the contra positive of #3 be "if people are not buying OR using less then things do not cost more"? Shouldn't the "and" be swapped to "or" when taking a contra positive?
trees → perennial plant with elongated stem LA KNIGHT: "YEAAAAAAAAH"..
5 out of 5, and that feels very good, seeing how things were when I first started. This used to be a foreign language to me.
I do not understand why I still find number 1 confusing, can someone explain it for me? please
@andrearovelo
Original Sentence: I would not be able to see Arun if he were in the next room.
Modified Sentence: If he were in the next room, then I would not be able to see Arun.
Sometimes you need to flip the order of the clauses in a conditional sentence. Think of IF → THEN like a math equation. The sentence has two parts: X and Y.
X is the condition, so it always goes in the “if” part of the sentence.
In this example, “if he were in the next room” is X. Since X is the “if” part, you put it first.