No cat is a rat?

[ruzedski]

Can someone please explain the answer?
No cat is rat.No rat is dog.So,
(a) No cat is dog.
(b)No dog is cat.
Is (a) true?
Is (b)true?
Is (a) and (b) true?
Is (a) and (b) false?
Thank you.

 

[rahul_parab2006]

Can someone please explain the answer?
No cat is rat.No rat is dog.So,
(a) No cat is dog.
(b)No dog is cat.
Is (a) true?
Is (b)true?
Is (a) and (b) true?
Is (a) and (b) false?
Thank you.

actually, can't say!!!
cat could be dog also, but not rat !

i will answer for it - both a & b r corrrect ..... both a n b r true...!!!
give me reply! i'm not sure with my answer...ok...response...plz...!!!

:SugarwareZ-098:

 

[dkm]

Can someone please explain the answer?
No cat is rat.No rat is dog.So,
(a) No cat is dog.
(b)No dog is cat.
Is (a) true?
Is (b)true?
Is (a) and (b) true?
Is (a) and (b) false?
Thank you.

The answer is (d)
Both (a) and (b) are false.
The dogs are are not rat, However they may OR may be CAT. No relationship is defined between rat and dog.

 

[neeraj_uchila]

Draw the venn diagramm in which both the CAT and RAT circles will be seprate but the relation between CAT and DOG is not given , so the DOG circle may or may not intersect or overlap with the CAT circle.So both the statements are false.

 

[gaurav200x]

Can u come out with the general approach of the Logic deduction used to solve for such questions taking a few examples and explaining the in-depth approach.

Thanks!

 

[nra29]

For these type of questions i have a flawless methods but cant explain it here in details

and ans for the Above question is (d)

Explanation:--- if both the statements are negative conclusion cant be drawn

 

[nra29]

Can someone please explain the answer?
No cat is rat.No rat is dog.So,
(a) No cat is dog.
(b)No dog is cat.
Is (a) true?
Is (b)true?
Is (a) and (b) true?
Is (a) and (b) false?
Thank you.

For these type of questions i have a flawless method but cant explain it here in details its kinda lengthy, I mean once u have mugged the rules these questions are sure marks

and ans for the Above question is (d)

Explanation:--- if both the statements are negative conclusion cant be drawn

 

[nra29]

For these type of questions i have a flawless methods but cant explain it here in details

and ans for the Above question is (d)

Explanation:--- if both the statements are negative conclusion cant be drawn

if somebody wants the detailed explanation please write ur e mail address , i would forward it to all

thanks and bye

 

[kartik]

Forwarding to email is not the right method to do it.

Please type it here to attach a document which has the explanation so that every single person can benifit from it.

PS : We do not allow public display of email id on our forums

 

[keshwendu]

This question can't be determined. Because, if solve it by ven diagram then conclusion is nothing. See, if No CAT is rat means two different circle for both CAT and RAT and also not intersecting anywhere, No RAT is DOG means that again both have different circle not intersecting in any way to each other. But the interesting thing is that because no relation between CAT and DOG has been given so DOG circle could intersect or couldn't intersect the CAT circle. So can't be determined.

Note: I m using circle as set of all group member for that case.

 

[gaurav200x]

This question can't be determined. Because, if solve it by ven diagram then conclusion is nothing. See, if No CAT is rat means two different circle for both CAT and RAT and also not intersecting anywhere, No RAT is DOG means that again both have different circle not intersecting in any way to each other. But the interesting thing is that because no relation between CAT and DOG has been given so DOG circle could intersect or couldn't intersect the CAT circle. So can't be determined.

Note: I m using circle as set of all group member for that case.

can u be more explanatory by explaining through drawings and creating them through paint

thanks

 

[keshwendu]

See this...
--------------------------- ---------------------------------
| | | |
| | | |
| CAT | | RAT |
| | | |
| | | |
--------------------------- ---------------------------------
Above is the ven diagram for the "No CAT is RAT". SO no part is common between them.
--------------------------- ---------------------------------
| | | |
| | | |
| RAT | | DOG |
| | | |
| | | |
--------------------------- ---------------------------------
Above is the ven diagram for the "No RAT is DOG". SO again no part is common between them.

Now we will consider the options "No CAT is DOG" and and "No DOG is CAT".
What are the different pssibilities. The first possibility is that there might have some CAT is DOG or all CAT is DOG so diagram is like this
----------------------------------------------------- -----------------------------
| | | | | DOG |
| | CAT | | | |
| CAT | & | DOG | or | ----------- |
| | DOG| | | | CAT | |
| | | | | ----------- |
------------------------------------------------------ -----------------------------

Second case is that "No CAT is DOG". So diagram is like that.
--------------------------- ---------------------------------
| | | |
| | | |
| CAT | | DOG |
| | | |
| | | |
--------------------------- ---------------------------------

So you can't exactly say that No CAT or DOG is DOG or CAT respectively(because no relationship is given in question).
:SugarwareZ-229:

 

[keshwendu]

Sorry for previous post but also i don't know how it happens.
See this again...
--------------------------- ----------- ---------------------------
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
|---------CAT-----------| ----------- |---------RAT------------|
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
--------------------------- ----------- ---------------------------
Above is the ven diagram for the "No CAT is RAT". SO no part is common between them.
--------------------------- ----------- ---------------------------
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
|---------RAT-----------| ----------- |---------DOG------------|
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
--------------------------- ----------- ---------------------------
Above is the ven diagram for the "No RAT is DOG". SO again no part is common between them.

Now we will consider the options "No CAT is DOG" and and "No DOG is CAT".
What are the different pssibilities. The first possibility is that there might have some CAT is DOG or all CAT is DOG so diagram is like this
---------------------------------------------- ------------ ------------------------------
|---------------- |-------- |---------------- |------------|--------------- DOG-------- |
|---------------- |--CAT--|---------------- |----------- |------------------------------ |
|-----CAT-------|----&---|-----DOG------|----or-----|------------------------------ |
|---------------- |--DOG-|-----------------|----------- |-------------|---CAT---|-----|
|-----------------|---------|-----------------|------------|----------------------------- |
---------------------------------------------- ----------- ------------------------------

Second case is that "No CAT is DOG". So diagram is like that.
--------------------------- ----------- ----------------------------
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
|---------CAT-----------| ----------- |---------RAT------------|
|-------------------------| ----------- |-------------------------|
|-------------------------| ----------- |-------------------------|
--------------------------- ----------- ----------------------------
So you can't exactly say that No CAT or DOG is DOG or CAT respectively(because no relationship is given in question).
:SugarwareZ-229:

 

[keshwendu]

*Note the last block is for DOG not the RAT by mistake i did it and not able to edit it.

 

[gaurav200x]

*Note the last block is for DOG not the RAT by mistake i did it and not able to edit it.

@keshwendu


Thanks for the effort u put in to give the answer, however, i wold suggest u that u use the paint to draw images, which would be easier and less taxing.

Now, i have a different answer from urs....

From the question it is clear that no cat is rat and then no rat is dog... hence, we can conclude that there is no cat which is rat and no rat which is the dog.

However, there might be some dogs which're rats and some rats which might be cats.

Now, since no cats are rats... there are no rats which can be cats. Again, no rat is a dog and hence there cant be any rats which can be dogs but the vice versa is not true.

since no cats -> rats and no rats->dogs
hence we can say that no cats-> dogs

p.s. since no direct info is related betn cats and dogs, we can consider it void and hence choice (a) is CORRECT

 

[keshwendu]

Thank you gaurav but if it is given that no cats are rat then it also means that no rats are cats. let us take an example, A not equal to B then it also means that B not equal to A.

we can give the problem an another look like this suppose CAT as A, RAT as B and DOG as C.

Now it is given that No A is B means that A not equal to B,
again given is No B is C means that B not equal to C.

So, interpretation is A not equal to B and B not equal to C.

Hence, We can't define the relationship between the A and C.
e.g. LET the value of A=5, B=15 and C=7.

given is A=!B and B=!C (*Here =! means not equal to)
By seeing above values, values satisfy the given condition So we can say A=!C thish is first result say.

Let another value of A=60, B=10 and C=60.
again given is A=!B and B=!C.
By seeing the values, again values satisfy the above equation So we can say tha A=C.

Now we have obtained two different contradicting results A=!C and A=C for the same given condition.

So, we conclude that might be No A is C or might be A is C.

Result can't be determined.

 

[kartik]

Explanation:--- if both the statements are negative conclusion cant be drawn

And agrees to kesh..

Ans is cannot b determined.

 

[gaurav200x]

@keshwendu

thanks man..... i think what u say is correct. However, i would be grateful to u, if u could add more problems of such kind but different variety and explain them as well, so that we can grasp the concept better

 

[akansha_khare]

i guess dis is data insufficient.... coz there is no rel between dog n cat given