Logical Reasoning - Logical Deduction - Discussion
Discussion Forum : Logical Deduction - Section 1 (Q.No. 8)
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.
8.
Statements: All flowers are trees. No fruit is tree.
Conclusions:
- No fruit is flower.
- Some trees are flowers.
Answer: Option
Explanation:
As discussed above, the conclusion must be universal negative and should not contain the middle term. So, it follows that 'No flower is fruit'. I is the converse of this conclusion and thus it follows. II is the converse of the first premise and so it also holds.
Discussion:
27 comments Page 1 of 3.
Azhar Imam said:
5 years ago
I don't understand this, please anyone tell me how it possible.
(2)
Kundan Kumar said:
7 years ago
Here's how both the conclusions follow:
premise 1: All flowers are trees. --> it's contrapositive: All non-trees are non-flowers.
premise 2: No fruit is a tree. --> it's contrapositive: No non-tree is non-fruit.
The middle term: non-tree and one premise is -ve => conclusion is -ve => No non-flowers is non-fruit => No fruit is flower => conclusion 1 follows.
So, conclusion 2 is converse of premise 1 hence it follows too.
premise 1: All flowers are trees. --> it's contrapositive: All non-trees are non-flowers.
premise 2: No fruit is a tree. --> it's contrapositive: No non-tree is non-fruit.
The middle term: non-tree and one premise is -ve => conclusion is -ve => No non-flowers is non-fruit => No fruit is flower => conclusion 1 follows.
So, conclusion 2 is converse of premise 1 hence it follows too.
Dipesh Gupta said:
8 years ago
Only conclusion one is true please correct it.
(1)
Sachin said:
8 years ago
No trees are a flower. Some trees are fruits.
Conclusion
(a) fruits that are trees, not flowers.
(b) no fruit is a flower.
Which statement follows/ unfollows? Please tell me with the explanation.
Conclusion
(a) fruits that are trees, not flowers.
(b) no fruit is a flower.
Which statement follows/ unfollows? Please tell me with the explanation.
Kuldee said:
8 years ago
Yes, A is correct answer.
Vikas maheshwari said:
9 years ago
A is correct answer because All flowers are trees.
Jesmon wango said:
9 years ago
Answer E is really correct. It's logical formula.
Abhi said:
9 years ago
A is correct answer.
Sourav bibhor said:
9 years ago
Answer will be 1 because answer does not contain middle term, and it will be negative.
Akshay said:
10 years ago
Both are universal and conclusion II is particular. Also it contains middle term and as statement contains negative the conclusion should be negative. So a is the answer I think.
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