I'm having trouble with the grammar in #5. I understand the subject and predicate. But it was difficult to hone in on 'Advances.' is there an easier way to break this sentence down?
(Maybe already stated, but I don't have time to read all these comments): "never" is not included as one of the common [negate, necessity] indicators but multiple examples use "never" in this exercise. Might be worth adding "never to the list.
#help T148 Section 3 problem 24 "manuscripts that are not frequently consulted by researchers will not be restored." I am very confused by whether to use condition one, i.e. sufficient or Condition four, negate necessary in this case, because the key word NOT as they generate different equation. The answer is using condition one obviously, utilizing conrapositive, to arrive at R->FC. But if I use Condition four, negate necessary, it becomes, FC->//R, thus /R->/FC, and you can never get R->FC from here. Can someone shine a light on this? I often found it is the negative and double negative that mess up my understanding and translating. Thank you!
For these group 4 indicators, I find it easier to go with the flow of the sentence (left to right) to be my sufficient and necessary (left to right) - so I always pick the second idea to negate and be the necessary condition first and "leave" the first idea on the left as the sufficient
For example: No holiday falls within the month of august.
I pick "within the month of august" to be the idea to negate.
I leave "holiday" alone in a sense - keeping it as my sufficient.
So -
Holiday --> /within the month of August.
It is easier for me to start here then flip things around and mess up the flow of the original sentence. I don't know if this is right of helpful but just how my brain works!
This made sense to me! I even noticed while I was doing the contrapositive for one of them how it didn't make ANY sense and corrected myself before looking! LOVE that it's actually clicking!
I've been getting necessary and sufficient confused at times. But I've noticed that a lot of the times I understand what the sentences logic is saying but Im unable to completely get the step by step process to do such. I often just think about how it is shown once everything is negated
i feel the opposite of all these comments, i keep getting the two concepts reversed and when I think I have it right, it of course is the reverse of that
Quick tip for anyone struggling to find the sufficient and necessary conditions in examples that begin with an indicator (#2, 3, 5). Rewrite the question with the word "cannot."
Ex: No birds are trees.---> Birds CANNOT be trees. Then, the lawgic translation is B--> /T.
It works with the other examples as well: No holiday falls within the month of August= Holidays CANNOT fall within the month of August. (H--> /A) OR
August CANNOT have holidays. (A--> /H).
This worked much more intuitively for me than just figuring it out by myself. I guess you could also say that the negated necessary term will always be the second premise as well...Whatever works lol!
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195 comments
So is Never officially part of group 4??
5/5!
if question 2, i said
/holiday - august
/august - holiday
is that correct?
I'm having trouble with the grammar in #5. I understand the subject and predicate. But it was difficult to hone in on 'Advances.' is there an easier way to break this sentence down?
Sufficient conditions:
if, when, where, all, every, any
Necessary conditions:
only, only if, only when, only where, always, must
Negate, sufficient:
or, unless, until, without
Negate, necessary:
no, none, not both, and cannot
(Maybe already stated, but I don't have time to read all these comments): "never" is not included as one of the common [negate, necessity] indicators but multiple examples use "never" in this exercise. Might be worth adding "never to the list.
#help I got 0/5 because all of my answers were backwards.
For example, on question 3, the answer was:
But I put:
Why is this happening?
#help T148 Section 3 problem 24 "manuscripts that are not frequently consulted by researchers will not be restored." I am very confused by whether to use condition one, i.e. sufficient or Condition four, negate necessary in this case, because the key word NOT as they generate different equation. The answer is using condition one obviously, utilizing conrapositive, to arrive at R->FC. But if I use Condition four, negate necessary, it becomes, FC->//R, thus /R->/FC, and you can never get R->FC from here. Can someone shine a light on this? I often found it is the negative and double negative that mess up my understanding and translating. Thank you!
For these group 4 indicators, I find it easier to go with the flow of the sentence (left to right) to be my sufficient and necessary (left to right) - so I always pick the second idea to negate and be the necessary condition first and "leave" the first idea on the left as the sufficient
For example: No holiday falls within the month of august.
I pick "within the month of august" to be the idea to negate.
I leave "holiday" alone in a sense - keeping it as my sufficient.
So -
Holiday --> /within the month of August.
It is easier for me to start here then flip things around and mess up the flow of the original sentence. I don't know if this is right of helpful but just how my brain works!
This made sense to me! I even noticed while I was doing the contrapositive for one of them how it didn't make ANY sense and corrected myself before looking! LOVE that it's actually clicking!
5/5 LFG
I've been getting necessary and sufficient confused at times. But I've noticed that a lot of the times I understand what the sentences logic is saying but Im unable to completely get the step by step process to do such. I often just think about how it is shown once everything is negated
i feel the opposite of all these comments, i keep getting the two concepts reversed and when I think I have it right, it of course is the reverse of that
5/5! This one made the others make sense
This lesson made all the other indicator lessons make sense. Soooo glad I finally got it.
What's with "Never" being an indicator when that wasn't stated?
I understand it now
this was suspiciously easy
A step implied but left out is to ignore the "No/None/Not both/Cannot/etc." indicator when negating and writing the statements.
#feedback
what about 'never'? It is not listed in your video.
does the order matter bc I did like this for number 3 No birds are trees.
T->/B
B->/T and
Answer was...
bird → /tree
tree → /bird
on question 2, I answered
/holiday -> in august
/in august -> holiday
is this logically the same as
holiday → /(within August)
within August → /holiday
or am i missing something? #helppls
5/5!!!
I see the vision
Quick tip for anyone struggling to find the sufficient and necessary conditions in examples that begin with an indicator (#2, 3, 5). Rewrite the question with the word "cannot."
Ex: No birds are trees.---> Birds CANNOT be trees. Then, the lawgic translation is B--> /T.
It works with the other examples as well: No holiday falls within the month of August= Holidays CANNOT fall within the month of August. (H--> /A) OR
August CANNOT have holidays. (A--> /H).
This worked much more intuitively for me than just figuring it out by myself. I guess you could also say that the negated necessary term will always be the second premise as well...Whatever works lol!