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Test: Logical Connectives- 1 - UPSC MCQ


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10 Questions MCQ Test - Test: Logical Connectives- 1

Test: Logical Connectives- 1 for UPSC 2024 is part of UPSC preparation. The Test: Logical Connectives- 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Logical Connectives- 1 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Logical Connectives- 1 below.
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Test: Logical Connectives- 1 - Question 1
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Q. Statements: All branches are flowers. All flowers are leaves.

Conclusions:

  1. All branches are leaves.
  2. All leaves are branches.
  3. All flowers are branches.
  4. Some leaves are branches.

Detailed Solution for Test: Logical Connectives- 1 - Question 1

Since both the premises are universal and affirmative, the conclusion must be universal affirmative and should not contain the middle term. So, it follows that 'All branches are leaves'. Thus, I follows. IV is the converse of this conclusion and so it also holds.

Test: Logical Connectives- 1 - Question 2
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Statements: Some bags are pockets. No pocket is a pouch.

Conclusions:

  1. No bag is a pouch.
  2. Some bags are not pouches.
  3. Some pockets are bags.
  4. No pocket is a bag.

Detailed Solution for Test: Logical Connectives- 1 - Question 2

Explanation:

Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. So, II follows. III is the converse of the first premise and thus it also holds.

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Test: Logical Connectives- 1 - Question 3
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Statements: All aeroplanes are trains. Some trains are chairs.

Conclusions:

  1. Some aeroplanes are chairs.
  2. Some chairs are aeroplanes.
  3. Some chairs are trains.
  4. Some trains are aeroplanes.

Detailed Solution for Test: Logical Connectives- 1 - Question 3

Explanation:

Since the middle term 'trains' is not distributed even once in the/premises, no definite conclusion follows. However, III is the converse of the second premise while IV is the converse of the first premise. So, both of them hold.

Test: Logical Connectives- 1 - Question 4
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Statements: All politicians are honest. All honest are fair.

Conclusions:

  1. Some honest are politicians.
  2. No honest is politician.
  3. Some fair are politicians.
  4. All fair are politicians.
Detailed Solution for Test: Logical Connectives- 1 - Question 4

Clearly, it follows that 'All politicians are fair'. I is the converse of the first premise, while III is the converse of the above conclusion. So, both I and III hold.

Test: Logical Connectives- 1 - Question 5
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Statements: Some clothes are marbles. Some marbles are bags.

Conclusions:

  1. No cloth is a bag.
  2. All marbles are bags.
  3. Some bags are clothes.
  4. No marble is a cloth.
Detailed Solution for Test: Logical Connectives- 1 - Question 5

Explanation:

Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. Thus, either I or III follows.

Test: Logical Connectives- 1 - Question 6
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Statements: Some tables are TVs. Some TVs are radios.

Conclusions:

  1. Some tables are radios.
  2. Some radios are tables.
  3. All radios are TVs.
  4. All TVs are tables.
Detailed Solution for Test: Logical Connectives- 1 - Question 6

So, none of the given options.

Test: Logical Connectives- 1 - Question 7
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Statements: All terrorists are guilty. All terrorists are criminals.

Conclusions:

  1. Either all criminals are guilty or all guilty are criminals.
  2. Some guilty persons are criminals.
  3. Generally criminals are guilty.
  4. Crime and guilt go together.
Detailed Solution for Test: Logical Connectives- 1 - Question 7

Explanation:

Since the middle term 'terrorists' is distributed twice in the premises, the conclusion cannot be universal. So, it follows that 'Some guilty persons are criminals'. Thus, II holds.

Test: Logical Connectives- 1 - Question 8
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Statements: Some books are pens. No pen is pencil.

Conclusions:

  1. Some pens are books.
  2. Some pencils are books.
  3. Some books are not pencils.
  4. All pencils are books.
Detailed Solution for Test: Logical Connectives- 1 - Question 8

Explanation:

Since one premise is particular and the other negative, the conclusion must be particular negative and should not contain the middle term. Thus, III follows. I is the converse of the first premise and so it also holds.

Test: Logical Connectives- 1 - Question 9
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Statements: Some bottles are drinks. All drinks are cups.

Conclusions:

  1. Some bottles are cups.
  2. Some cups are drinks.
  3. All drinks are bottles.
  4. All cups are drinks.
Detailed Solution for Test: Logical Connectives- 1 - Question 9

Explanation:

Since one premise is particular, the conclusion must be particular and should not contain the middle term. So, it follows that 'Some bottles are cups'. Thus, I follows. II is the converse of the second premise and so it also holds.

Test: Logical Connectives- 1 - Question 10
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Statements: Some houses are offices. Some offices are schools.

Conclusions:

  1. Some schools are houses.
  2. Some offices are houses.
  3. No house is school.
  4. Some schools are offices.
Detailed Solution for Test: Logical Connectives- 1 - Question 10

Explanation:

Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. So, either I or III follows. II is the converse of the first premise while IV is the converse of the second premise. Thus, both of them hold.

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