Logical Reasoning - Logical Deduction - Discussion
Discussion Forum : Logical Deduction - Section 1 (Q.No. 11)
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.
11.
Statements: All fish are tortoise. No tortoise is a crocodile.
Conclusions:
- No crocodile is a fish.
- No fish is a crocodile.
Answer: Option
Explanation:
Since both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, II follows; I is the converse of II and thus it also holds.
Discussion:
7 comments Page 1 of 1.
Anami said:
9 years ago
All fish --> Tortoise.
0 or No fish --> Crocodile.
Therefore
A/1 crocodile ---> no fish.
BUT
0 Crocodile ----/---> a fish, it is all fish.
0 or No fish --> Crocodile.
Therefore
A/1 crocodile ---> no fish.
BUT
0 Crocodile ----/---> a fish, it is all fish.
Dhineshbabu said:
10 years ago
How both follows please explain, because the thing fish is not mentioned on the question, either it may be inside the others, that's what I thought.
Jignesh said:
7 years ago
I agree @Lipika.
As per rule number 3, the middle term is distributed at least once in premises. Otherwise, no any conclusion follows.
As per rule number 3, the middle term is distributed at least once in premises. Otherwise, no any conclusion follows.
Lipika said:
8 years ago
The middle term is not distributed in any of the premises. So according to the rules, there should not be any conclusion, right?
Dipali said:
9 years ago
How both follow please explain? Because we learned that if negative conclusion is given we have to draw the complementary pair.
Abdul Hadi said:
4 years ago
What is meant by the middle term? Explain.
(1)
Balasundar said:
8 years ago
I can't understand. Help me to get it.
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