Shortcut to solve syllogism by rules
Day 6: Certain Controversy and Exceptional Case
Two Exceptional Case of SOME NOT
On Day 3 we learned a rule that SOME NOT + ANYTHING = NO CONCLUSION
Here we will see two exceptional cases in which SOME NOT and ALL are involved. Rest everything can be solved by using the table discussed on Day 3.
Exception 1:
Exception 2:
In Rest All case of SOME NOT + ALL or Any other proposition we will get NO CONCLUSION
Example 1: Some A are not B + All B is C. Here the common term B is neither in the starting in both the proposition neither at the end in both proposition. So exceptional case is not valid here.
Example 2: Tell which of the following conclusion follows
Statement:
All red is pink
Some red is not green
Conclusion:
I. Some green are not pink
II. Some Pink are not green
Example 3: Tell which of the following conclusion follows
Statement:
Some blue are not green
All red is green
Conclusion:
I. Some blue are not red
II. Some red are not blue.
Certain Controversy
| Case | Solution | |
| 1 | Does restatement follows? | As explained on Day 5 The Rule is 1) Restatement Follows 2) Possibility of Restatement Doesn’t Follows Example: Statement: Some A are B Conclusion: Some A are B(Follows) Some A are B is a possibility(Doesn’t Follows) |
| 2. | Does Some A is B means Some A are Not B or vice versa? | NO. It does not means. |
| 3. | Does All + No makes complimentary pair? | NO. They don’t. On Day 5 we have covered this topic |
| 4. | The statement All A are Not B ??? What does it means |
This is a controversial statement which can have two meaning. So you will never get this statement in exam. |
Certain Special words used in Syllogism and their meaning
| Terms | Meaning | Example |
| Atleast, Most, Many, few | SOME | Atleast some A are B* OR Most A are B OR Many A are B OR Few A are B => Some A are B *In exams you will mostly find the case of Atleast. |
| Only | Statement: Only A is B | Conclusion: All B is A |
Trick to solve the new pattern syllogism in short time using rules
By using rules we can solve the new pattern reverse syllogism questions in very less time. We can further reduce this time by having a correct thought process while solving the question. In the below example we will show the right approach to solve such question.
Example 4: Conclusions: Some cars are not trucks. Some buses are trucks.
STATEMENTS:
A) All cars are scooters. No bus is scooter. Some busses are trucks.
B) All cars are scooters. No truck is scooter. All trucks are busses.
C) All cars are scooters. All bus are scooters. All trucks are busses.
D) Some cars are scooters. No truck is scooter. No bus is car.
E) None
Now how to tackle such questions? You can either check all the option and get the correct answer easily. Or you can simultaneously use elimination and reduce the number of options that you have to check. To eliminate wrong options follow this approach:
One of the Conclusion is SOME NOT : When do we get SOME NOT? We get one SOME NOT when one of the proposition is SOME and another is NO. OR we can also get SOME NOT when tthere is case of NO :example No A is B also means that Some A is Not B. So even If All + No is there we can get SOME NOT.
So check in each option at a glance which option does not contains Some + No OR All + No together And eliminate that option as that cannot be the answer.
So we get Option C) cannot be the ans as it has Only ALL.
Now go to the second conclusion: We have the case of SOME. When do we get SOME? We get Some when the first proposition is Some and the second is All. Or both is ALL. Now scan the remaining options which does not have either Some+ All or All + All together. So see that Option D is also eliminated.
Now we are left with only Option A) and B) now use the rules and check both the case. And get the final answer. You can practice this though process now and gain expertise over it and use it in real exam.
Questions for Practise
- Conclusions:
(i) All red is blue is a possibility.
(ii) All green being yellow is a possibility.
STATEMENTS:
A) All red is yellow. All yellow is blue. No blue is green.
B) Some red is yellow. No yellow is blue. Some blue is green.
C) Some red is yellow. Some yellow is blue. No blue is green.
D) All red is yellow. No yellow is blue. All blue is green.
E) None
- Conclusions:
(i) Some business are express
(ii) Some express are times
STATEMENTS:
A) All business are standard. All standard is times. Some times are express.
B) All business is standard. Some standard are times. All times are express.
C) No business is standard. All standard are times. Some times are express.
D) Some business is standard. All standard is times. No times is express
E) None
- Conclusions:
(i) Some heater are lamp.
(ii) Some fan are lamp.
STATEMENTS:
A) All lamp are bulb. All bulb are fan. Some fan are heater.
B) All lamp are bulb. Some bulb are fan. All fan are heater.
C) Some lamp are bulb. All bulb are fan. All fan are heater
D) All lamp are bulb. All bulb are fan. Some fan are heater.
E) None
- Conclusions:
(i) Some tulip are not lily.
(ii) Some flower are rose.
STATEMENTS:
A) Some rose are not lily. All rose are tulip. All tulip are flower.
B) All tulip are rose. Some lily are not rose. Some tulip are flower.
C) All rose are lily. No lily is tulip. No tulip are flower.
D) Some rose are lily. No lily is tulip. Some tulip are flower
E) None
- Conclusions:
(i) All water being river is a possibility
(ii) Some ocean are not lake.
STATEMENTS:
A) Some lakes are water. All water us ocean. No ocean is river.
B) All lakes are water. All water is ocean. Some ocean is river.
C) All lakes are water. No water is ocean. Some ocean is river.
D) Some lakes are water. Some water is ocean. All ocean is river.
E) None
This is the end of the course in Syllogism by Rules.
Ask your doubt in comment section.
Thank You!!!!!
thnq very much
sir eg 3 mai typo hai ? some ke place par some not hona chahiye ?
yes u r right,, some not hoga,, will edit it
sir ALL+NO = NO
then Eg 4 mai some not kaise ? So even If All + No is there we can get SOME NOT.
All+no=no
But
No +all= some not
All+no =no
And if no a is b means some a are not b will also be true.. see part 5 concepts
got it
thank uh sir
Suraj sir
Yes?
Sir, me syllo by rule hi krti hu but exceptional case nhi padha tha mene..Muje usme doubt h
Kya doubt?
Some blue are not green
All red is green
Conclusion:
I. Some blue are not red
II. Some red are not blue.
1st q nhi hoga
Isme some blue are not red true hoga. Means 1st wala. In that example maine typing mistake se only ii follow likh diya.. explanation me see some blue are not red likha h.. will edit it
Ohh.. Mai last 15 mins se wahi soch rhi thi..
Thank u..
All explainations are very good. ??
Thanku 🙂
Sir..
Expl 4 me 2 statement..
is it correct??
Car and truck wala?
Yes
All + no = no them some not kyu. Ye doubt h?
Example 4: Conclusions: Some cars are not trucks. Some buses are trucks.
STATEMENTS:
A) All cars are scooters. No bus is scooter. Some busses are trucks.
B) All cars are scooters. No truck is scooter. All trucks are busses.
C) All cars are scooters. All bus are scooters. All trucks are busses.
D) Some cars are scooters. No truck is scooter. No bus is car.
E) None
Some buses are trucks is a definite conclusion. Ye Sahi h..
1st conclusion kese
In B) using first two we get no car is truck
and if NO A IS B then some A are not B Or some B are not A .. ye dono bhi true honge.. part 5 dekhna syllogism ka. Usme ye sab diya h
So some car are not truck true hoga
Got it.
Sorry sir..Taking ur time.
Its ok. We are here to help
Ty..:)
Sir..
One more doubt in last que..
May I ask?
YES
ruhi ????
NO
R KO
Case of Complementary Pair (EITHER-OR)
YEH WALA RULE AYA SAMJH SYLLOSYSM KA
yes ask
Suraj sir
sir eg4 mai some rose are not lily. all rose are tulip => some tulip are not lily kese hua
issi post me exception case 1 dekho,, uska example hai ye
oh ab clear ho gaya sir
thanks
sir tell me syllogs with diagram method
@surajskt:disqus sir
Atleast some A are B
No A are B
#isme either -or follow hoga? mns ye conclusion h agr to?
ha hoga,,
coz atleast simply means some..
okk
@surajskt:disqus sir
Tysm Sir:) for bringing these rules in light.I was in quest for complete rules since a long..due to increasing level of difficulty i dropped this method bcz nobody was der to solve the queries but now can ask….so,Thank u:)
:))
yes you can ask anytime
Sir, possibility me apne ek case btaya h
Statement -No A are B
Conclusion-NO B is A
Some A are not B
Some B are not A
#my doubt is last two conclusion k jo points h how do we recognise dat its of possibility case? because NO ka conversion to sirf ek hi hota h i.e first conclusion.
and sir “can never be” line is also consider as possibility na? for ex-
Q.statement=Some A are C
Some B are C
conclusion=All A can never be B
some A are B….its ans? only 1 or none?
dekho, JAB koi bhi A , B nhi hai,, to definitely some A are not B… isliye isse possibility nhi keh sakte,,, ye definite conclusion me ayega…
but sir apne to ise possibility wale section me btaya h 😐
lekin aage possibility nhi likha hai na,, jiske aage possibility likha hai ,, bas wahi possibility hai,, for example ye image dekho
https://uploads.disquscdn.com/images/863f4bfdb894c6b40752d215f21a5595ab74f9cac15264c9b1ba91cf32d44eb8.jpg
ok sir…mns NO k three conclusion will be consider?
one more ques plzz if in conclusion its gvn
All A are B
No A is B
so wat will be ans ? agr hm is NO ko somenot me convert kr denge to complimentary case k acco. either or ho jaega but in actual ALL NO me to either or hota nhi so ans to none hona chahie …and sir none hi bht tym dekha b h..bit confused 😐
lekin there is a difference ki kab ye 3 conclusion consider karne hai…
jab hamara conclusion aaya ho, ki SOme A is B,,, and question k conclusion me diya ho, ki SOme A are not B.. then ye wala rule follow krna hai,, is case me aise nhi kr sakte ,, isme sirf reverse wala concept jo day 2 me hai,, wo follow krenege..
It is like this… jab ques me diye statements ko reverse krna padea,, then use only the case of reverse,, jo day 2 me hai,, and not this one..
and use this table,, when u have got a conclusion between A and B suppose,, Like No A is B is what u have got.. and in ques it is asked some A are not B.. then u should use this table,, ki kya No A is B se ye true hoga?? think like this,, agar hoga then mark it as ur ans..
and for this doubt
All A are B
No A is B
isme u r reversing the conclusion.. means jo concluion me diya hai,, uspe rule aplly kr rhi,, we cannot do this,, jo conclusion hume mila hai,, by rules using the statements rules bas uspe aplly karnge
hmm got it tysm 🙂
none hoga iska..
1 isliye nhi follow hoga coz by rules
Some A are C + SOme C are B= no conclusion, means any possibility between A and B is true.. it means All A can be B.. hence iska reverse is false
ohh mns negative possibility is false ..and positive one is true
yes negative possibility k case me,, positive ko check krte hai,, and agar wo true hai,, then negative false rahega
ohk tysm sir 🙂
Gud mrng sir….one doubt in “can never be” continuation that i asked a long tym ago..
Statement- All Apple are grapes.
Some Apple are mango
No mango is banana
All banana are guava
Conclusion-Some grapes can be Bananas
All apple can never be guavas.
# doubt is-u told that negative possibility me apn positive case check krte h agr wo true hota h to negative possibility incrct ho jaegi and ithr All apple can be guavas ho skta islie negative possibility incorrect hona chahie but ans is both..and sir both kr b skte h agr venn bnae to..plzz explain..
show the venn diagram….
as per venn also all apple can be guava..
yup sir.. i think ans is gvn wrong …only 1 will follow
One more question sir
Statement-
All A are B
No A is C
Conclusion
All A can never be C
Some B can never be C
One more facing confusion in never case
Statement-
No houses are villages.
All villages are towns.
All towns are cities.
Conclusions :
I. All villages are cities.
II. All towns can never be houses. It’s ans?
NO+ All= Some not reverse
means some town are not house is the conclusion..
when some town are not house, then definetly all towns will never be house, so 2 follows
1 also follows- all + all= all
Yup sir..one more I HV asked
Statement. Some B are not D
All D are E
Con. Some B are not E
Sir it follow by diagram please clear it is right??
see this:
https://uploads.disquscdn.com/images/7f5e8e776718ca9f8df9e60bca252cc2756b8472b1893d71b15f5def87b24347.jpg
statement: all A are B
some B are C
No C is D
all D are E
Conclusion:
Some B are not E
Some C are not D
Some D are not C
Some B are C
which one follow??
2,3,4 will follow..
Restatement doesn’t follow
acc. to the suraj sir rules, it follows, rest its a controversial, don’t know what is right or wrong..
our teacher said that restatement doesn’t follow because we can’t prove by diagram it is already showed
ok thanks
do u know where deep, ronnie , barbie are quizzing?
sorry..no idea about them
Ok thanku:-)
Statements:
No key is door, All door are lock, Some window are key, Some door are window
Conclusions:
I. All window being door is a possibility
II. All lock being key is a possibility
III. No key is lock.
IV. All lock are door
1.Only I doesn’tfollows
2.Only I and III follow
3.Only I, III and IV doesn’t follow
4.Only I, II and III doesn’t follow
5.None follows
What is the answer?
Only conclusion 1st follow s
None follow
1 follows
Sir,
Each means ALL or Some
All
All
All Q r T, some T r G, some Q r P
Conclusion.. 1. someP r not G
2. If some P which are not T are not Q….
Pls let me know the meaning of ” if “…here?
Is Some A are not B implies All A are not B? or is it vice versa?
thank you very useful
but always one doubt …restatement follows or not pls rly to us..as early as possible tomorrow exam sir
All people have there own views on restatement, its a debated topic
No need to do, will not be asked in exam.
maam … Can be and can never be possibility hoti hai ya definite?
doubt clear kar do maam..
Possibility
Ms.Subhra can u pls say is ” can never be” is possility conclusion as like “can be” ?
Since I don’t know Hindi I can’t understand what he asked completely
Sir, for 2nd question, if there was a statement with “ALL” in the 3 condition s
ie,
All business are standard.
All standard is times.
All times are express.
Will it be the answer?
My only doubt here is if we combine all 3, we will get All business are express .
Since all can be written as some, it will give the answer. But can we do such a thing?
@su@surajskt:disqus sir same doubt … Clear pls 🙂