Logical Reasoning - Logical Deduction - Discussion
Discussion Forum : Logical Deduction - Section 1 (Q.No. 15)
Directions to Solve
In each question below are given two statements followed by two conclusions numbered I and II. You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. Read the conclusion and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
Give answer:
- (A) If only conclusion I follows
- (B) If only conclusion II follows
- (C) If either I or II follows
- (D) If neither I nor II follows and
- (E) If both I and II follow.
15.
Statements: All fishes are grey in colour. Some fishes are heavy.
Conclusions:
- All heavy fishes are grey in colour.
- All light fishes are not grey in colour.
Answer: Option
Explanation:
Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some heavy things are grey in colour'. I is a cumulative result of this conclusion and the first premise. Thus, only I holds.
Discussion:
39 comments Page 2 of 4.
Ako venuh said:
1 decade ago
The conclusion cannot contain the middle term (fishes). And since one of the premises is particular the conclusion should be particular.
V.Pandieswari said:
1 decade ago
Answer is D, statement 1 is universal positive and statement 2 is particular positive so conclusion must in the form of particular.
Kanwar said:
1 decade ago
The question has error as assumption 1 written in question doesn't match as that explained in explanation see carefully.
Abhi said:
1 decade ago
Answer is D.
In this case conclusion must start with some.
The conclusion will be some heavy things are gray in color.
In this case conclusion must start with some.
The conclusion will be some heavy things are gray in color.
Sourav bibhor said:
9 years ago
Middle term should not come in the solution so it is invalid, answer should be particular affirmative should.
Abhiman sahoo said:
1 decade ago
If one of the premises is particular (contains some) then conclusion must be particular.
Hence answer is D.
Hence answer is D.
Bill said:
7 years ago
It has to be A.
If all fish are grey then how can a thing that isn't grey be a fish as they are all grey.
If all fish are grey then how can a thing that isn't grey be a fish as they are all grey.
Pooja said:
10 years ago
According to syllogism Answer must be D. Correct Answer should be "Some heavy fishes are grey in color".
Rajeev sati said:
9 years ago
There conclusion must be particular and 1st conclusion is not particular. So the answer should be D.
Rajeev kumar said:
1 decade ago
2nd conclusion is full inversion of 1st conclusion. So it should be valid.hence answer should be E.
(1)
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