# Logical Reasoning (CBSE-NET (UGC) Paper-I): Questions 18 - 21 of 28

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## Question number: 18

» Logical Reasoning » Based on Arguments

Appeared in Year: 2016

MCQ▾

### Question

Select the code, which is not correct in the context of deductive argument with two premises: (July)

### Choices

Choice (4) Response

a.

An argument with two false premises and a false conclusion may be valid.

b.

An argument with two true premises and a false conclusion may be valid.

c.

An argument with one true premise, one false premise and a true conclusion may be valid.

d.

An argument with one true premise, one false premise and a false conclusion may be valid.

## Question number: 19

» Logical Reasoning » Based on Arguments

Appeared in Year: 2016

MCQ▾

### Question

Among the following propositions two are related in such a way that one is the denial of the other. Which are those propositions? Select the correct code:

Propositions:

1. All women are equal to men

2. Some women are equal to men

3. Some women are not equal to men

4. No women are equal to men

### Choices

Choice (4) Response

a.

(1) and (4)

b.

(1) and (3)

c.

(1) and (2)

d.

(3) and (4)

## Question number: 20

» Logical Reasoning » Based on Arguments

MCQ▾

### Question

Select the code, which states the condition of an invalid deductive argument:

### Choices

Choice (4) Response

a.

Some of the premises are true but the conclusion is false.

b.

All the premises are false and the conclusion is also false.

c.

All the premises are true and the conclusion is also true.

d.

All the premises are true but the conclusion is false.

## Question number: 21

» Logical Reasoning » Based on Conclusions

Statement-Conclusion▾

### Statement

(i) All bats are mammals.

(ii) Birds are not bats.

### Conclusions

1. Birds are not mammals.

2. Bats are not birds.

3. All mammals are bats.

4. Some mammals are bats.

### Choices

Choice (4) Response

a.

Either conclusion Ⅰ or conclusion Ⅱ can follow & both conclusion Ⅲ & conclusion Ⅳ follow & only conclusion Ⅳ can follow.

b.

c.

Either conclusion Ⅱ or conclusion Ⅳ can follow & both conclusion Ⅰ & conclusion Ⅲ follow.

d.

Either conclusion Ⅱ or conclusion Ⅳ can follow.

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