Deck 2: Logical Forms and the Square of Opposition in Propositional Logic

Question 1

The logical form of the sentence 'None but women can understand women'

A)all those who can understand women are women
B)some women are those who can understand women
C)some women are not those who can understand women
D)none of the above

Answer 1

all those who can understand women are women

Question 2

The logical form of the sentence 'A few lawyers are prosperous'

A)some lawyers are prosperous
B)some lawyers are not prosperous
C)no lawyers are prosperous
D)none of the above

Answer 2

some lawyers are prosperous

Question 3

The logical form of the sentence 'No lazy man succeeds in life'

A)no lazy men are those who succeeds in life
B)all lazy men are those who succeeds in life
C)some lazy men are those who succeeds in life
D)none of the above

Answer 3

no lazy men are those who succeeds in life

Question 4

The logical form of the sentence 'Few men are free from vanity'

A)some men are free from vanity
B)all men are free from vanity
C)some men are not free from vanity
D)none of the above

Question 5

The logical form of the sentence 'All adults can vote'

A)no adults are those who can vote
B)all adults are those who can vote
C)some adults are those who can vote
D)some adults are not those who can vote

Question 6

The logical form of the sentence 'A few men are liberal minded'

A)some men are not liberal minded
B)all men are liberal minded
C)no men are liberal minded
D)some men are liberal minded

Question 7

The logical form of the sentence 'All docters in the world can save you'

A)all docters in the world are those who can save you
B)no docters in the world are those who can save you
C)some docters in the world are those who can save you
D)none of the above

Question 8

The logical form of the sentence 'Every Spartan is not a hero'

A)some spartans are heroes
B)no spartans are heroes
C)some spartans are not heroes
D)none of the above

Question 9

The logical form of the sentence 'All are not wise who read much'

A)n one who read much are wise
B)some who read much are not wise
C)all who read much are wise
D)none of the above

Question 10

The logical form of the sentence 'A fool is not always wrong '

A)some fools are not wrong
B)no fools are wrong
C)some fools are wrong
D)none of the above

Question 11

The logical form of the sentence 'The virtuous are seldom miserable'

A)no virtuous are miserable
B)some virtuous are miserable
C)some virtuous people are not miserable
D)none of the above

Question 12

The logical form of the sentence 'Few men really know their own mind'

A)some men are those who really know their own mind
B)all men are not those who really know their own mind
C)no men are those who really know their own mind
D)none of the above

Question 13

The logical form of the sentence 'A few students were present'

A)some students are those who were present
B)some students are not those who were present
C)no students are those who were present
D)none of the above

Question 14

The logical form of the sentence 'Many Americans are rich'

A)all americans are rich
B)some americans are rich
C)some americans are not rich
D)none of the above

Question 15

The logical form of the sentence 'Only the wise are happy'

A)all wise people are happy
B)no wise people are happy
C)all happy persons are wise
D)none of the above

Question 16

In the traditional square of opposition, A and E are ………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 17

In the traditional square of opposition, A and I are ………………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 18

In the traditional square of opposition, A and O are ………………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 19

In the traditional square of opposition, E and O are ………………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 20

In the traditional square of opposition, E and I are ………………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 21

In the traditional square of opposition, I and O are ………………………..

A)contradictories
B)sub-contraries
C)contraries
D)sub-alterns

Question 22

In the traditional square of opposition, the contrary of 'All men are mortal'is ……….

A)no men are mortal
B)some men are mortal
C)some men are not mortal
D)none of the above

Question 23

In the traditional square of opposition, the sub-altern of 'All men are mortal' is ……….

A)no men are mortal
B)some men are mortal
C)some men are not mortal
D)none of the above

Question 24

In the traditional square of opposition, the contradictory of 'All men are mortal'is……….

A)no men are mortal
B)some men are mortal
C)some men are not mortal
D)none of the above

Question 25

In the traditional square of opposition, the contradictory of 'No men are mortal' is……….

A)all men are mortal
B)some men are mortal
C)some men are not mortal
D)none of the above