I think the contrapositive is actually what helped me with this a lot. Sometimes I would start with that and work backwards to figure out the logic of what the sentence was saying. Maybe won't work with more complex things, but it helped me figure out which one was sufficient and which one was necessary.
hello, i want someone to check my understanding for question 1, "its always sunny in Philly." my understanding was that "its" isn't enough; we need to categorize two ideas, so theres some nuance and its fine. so the main ideas were sunny and Philly. besides, always indicates neccessary condition.
Can someone please explain to me how on number three - the "oral myths that have survived" is a sufficient condition when the indicator before it says "the only"? I thought "Only" was an indicator of a necessary condition.
I feel like the order is not following based on the previous video. It said the logical indicator would then mean the condition after is the necessary condition. However, sometimes on these it is not following. Anyone else agree?
How do you know what idea goes first? Many seem intuitively correct, but I need to rely on logic. Why am tripping up on this? I wrote P then S. Translation rule "the idea immediately following the logical indicator is the necessary condition," which would make it sunny. Is there a rule of order? 😵💫
I think what confused me is I assumed that this exercise would have more focus on the group 2 indicators. So I was switching the parts of the idea and getting the logic wrong. For instance we focused on every, only, when and where and I completely forgot those were group 1 indicators. I think this might've been more helpful if they were to actually give us a skill builder that follows the new terms we were given following the lesson: only if, only when, must etc.
I got question 3 wrong, but reinterpreting the sentence as "Only written-down oral myths have survived" helps since the wording is deceptive.
Another way to look at the question is to imagine the set relationships. Written down myths are the superset, because surviving myths must be in that set (since there are no surviving myths that were not written).
By that principle, "written down" is necessary for the myth's "survive" which is exactly what the sentence is saying. i.e. "survived" is sufficient to say that the myth was "written down".
anyone have an easy way to remember these indicators? its so easy to mix them up and flip them around. So far, ive been using "SuN" to remember the positions of the Sufficient and Necessary. (the u is silent / represents the arrow lmao)
One interesting finding about "only" and "the only" after question 3:
If it is written as "The only myths that survived are written down." It means "if the myth is survived, then it is written down", or "if the myth is not written down, then it is not survived".
However, if it is written as "Only myths that survived are written down." It means "if the myth is written down, then it is survived", or "if the myth is not survived, it is not written down.
This is a very poor explanation of #3. I have enjoyed this program until this point. But he has taken many liberties and made many assumptions leading a very incomplete explanation of the process used on #3. And that is also clearly voiced in the comments. This is disappointing. Edit the video here, draw the subset and super set, and provide further clarity for this question. Again, it is clear by reading the comments (over 350 and counting) that people are not only struggling with this question, but they find the explanation to be incomplete and insufficient for complete understanding.
Edit: Now that I have focused on the other questions more closely, I can say that most of the explanations of this video are not like previous videos. The explanations need to have more detail. Every single one should have a diagram and all of them should be translated back into English after the contrapositive. This is still early in the core curriculum. Many of us (again, check the comments) are searching for clarity. We have not ventured this far into the core curriculum because we are doing this as a hobby. We are driven and care a great deal about understanding all of the content. Hopefully you will consider editing this video. For those that did not see the group one list and "the only" was missing from the video: while I understand your frustration, and empathize, it was clearly an oversight. That kind of mistake is easily rectified by reading the text or reading the discussion.
However, 7Sage, what isn't easily rectified is brief and/or incomplete explanations of process and solutions. I have really enjoyed and appreciated this program thus far. However, please improve the video for this lesson. Thank you.
I guess it's important to not just watch the video but to also browse the text below the video. I, like most others, got number 3 incorrect because the video for sufficient condition indicators doesn't include "the only" as an indicator, but the text below does list it as one.
as others have said, the video on group 1 indicators must be edited because i too am only watching the videos, and the list did not include "the only" so question 3 had me very confused.
I do not understand question 3. If the necessary condition goes after the arrow, sufficient condition → necessary condition. And the indicator introduces the nessary condition, in this case "only" oral myths that have survived are the ones that were eventually written down.
wouldn't the answer be "written down-> oral myths that survived" instead of the other way around?
11
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395 comments
Necessary Condition (NC) = Superset
Sufficient Condition (SC) = Subset
If SC is met then the NC is also me.
However the NC can be met while the SC is not. (Kamar being late but not getting cited).
This breakdown has helped me sooo much.
The only way I can get all of these questions right is by reading the lesson notes...
I think the contrapositive is actually what helped me with this a lot. Sometimes I would start with that and work backwards to figure out the logic of what the sentence was saying. Maybe won't work with more complex things, but it helped me figure out which one was sufficient and which one was necessary.
Philadelphia → sunny
/sunny → /Philadelphia
Therefore,
(1)philadelphia is always sunny
(2) If its not sunny, its not in Philadelphia
even though 2 is factually incorrect, is this the right way to go about it? please help
hello, i want someone to check my understanding for question 1, "its always sunny in Philly." my understanding was that "its" isn't enough; we need to categorize two ideas, so theres some nuance and its fine. so the main ideas were sunny and Philly. besides, always indicates neccessary condition.
The first one makes sense when I don't think about what he did in the previous example.
Late -> 5+ was written in that order.
Sunny -> Philidelphia. I follow the same logic but apparently it's wrong.
Can someone please explain to me how on number three - the "oral myths that have survived" is a sufficient condition when the indicator before it says "the only"? I thought "Only" was an indicator of a necessary condition.
Anyone help me?
I genuinely think in contrapositives haha. Is this a good thing?
If it rains in Oklahoma, grasshoppers ride motorcycles into the sunset.
/grasshoppers -> /rain OK
rain OK -> grasshoppers.
I feel this could cost me time in negating everything immediately as I read it. please advise.
I feel like the order is not following based on the previous video. It said the logical indicator would then mean the condition after is the necessary condition. However, sometimes on these it is not following. Anyone else agree?
this one tripped me up the most... i couldn't understand the order
How do you know what idea goes first? Many seem intuitively correct, but I need to rely on logic. Why am tripping up on this? I wrote P then S. Translation rule "the idea immediately following the logical indicator is the necessary condition," which would make it sunny. Is there a rule of order? 😵💫
I think what confused me is I assumed that this exercise would have more focus on the group 2 indicators. So I was switching the parts of the idea and getting the logic wrong. For instance we focused on every, only, when and where and I completely forgot those were group 1 indicators. I think this might've been more helpful if they were to actually give us a skill builder that follows the new terms we were given following the lesson: only if, only when, must etc.
I got question 3 wrong, but reinterpreting the sentence as "Only written-down oral myths have survived" helps since the wording is deceptive.
Another way to look at the question is to imagine the set relationships. Written down myths are the superset, because surviving myths must be in that set (since there are no surviving myths that were not written).
By that principle, "written down" is necessary for the myth's "survive" which is exactly what the sentence is saying. i.e. "survived" is sufficient to say that the myth was "written down".
Is it recommended to be doing drill sets while in the foundations stage?? Not sure what is too much or not enough?
anyone have an easy way to remember these indicators? its so easy to mix them up and flip them around. So far, ive been using "SuN" to remember the positions of the Sufficient and Necessary. (the u is silent / represents the arrow lmao)
One interesting finding about "only" and "the only" after question 3:
If it is written as "The only myths that survived are written down." It means "if the myth is survived, then it is written down", or "if the myth is not written down, then it is not survived".
However, if it is written as "Only myths that survived are written down." It means "if the myth is written down, then it is survived", or "if the myth is not survived, it is not written down.
4/5
This is a very poor explanation of #3. I have enjoyed this program until this point. But he has taken many liberties and made many assumptions leading a very incomplete explanation of the process used on #3. And that is also clearly voiced in the comments. This is disappointing. Edit the video here, draw the subset and super set, and provide further clarity for this question. Again, it is clear by reading the comments (over 350 and counting) that people are not only struggling with this question, but they find the explanation to be incomplete and insufficient for complete understanding.
Edit: Now that I have focused on the other questions more closely, I can say that most of the explanations of this video are not like previous videos. The explanations need to have more detail. Every single one should have a diagram and all of them should be translated back into English after the contrapositive. This is still early in the core curriculum. Many of us (again, check the comments) are searching for clarity. We have not ventured this far into the core curriculum because we are doing this as a hobby. We are driven and care a great deal about understanding all of the content. Hopefully you will consider editing this video. For those that did not see the group one list and "the only" was missing from the video: while I understand your frustration, and empathize, it was clearly an oversight. That kind of mistake is easily rectified by reading the text or reading the discussion.
However, 7Sage, what isn't easily rectified is brief and/or incomplete explanations of process and solutions. I have really enjoyed and appreciated this program thus far. However, please improve the video for this lesson. Thank you.
I guess it's important to not just watch the video but to also browse the text below the video. I, like most others, got number 3 incorrect because the video for sufficient condition indicators doesn't include "the only" as an indicator, but the text below does list it as one.
"The only" not being included in the Group 1 indicators video then being the crux for question 3 is a bit whack.
4/5
so the problem I'm facing is the placement of conditions and I see that it is a common problem, how do we solve that.
im confused, i thought only and only if were necessary indicators, but for question 3, why is "only if" a sufficient condition indicator?
as others have said, the video on group 1 indicators must be edited because i too am only watching the videos, and the list did not include "the only" so question 3 had me very confused.
I do not understand question 3. If the necessary condition goes after the arrow, sufficient condition → necessary condition. And the indicator introduces the nessary condition, in this case "only" oral myths that have survived are the ones that were eventually written down.
wouldn't the answer be "written down-> oral myths that survived" instead of the other way around?