Question 1

Which of the five rules for evaluating syllogisms can you use to determine whether the following form is valid?
All M are P. All M are S. So, all S are P.

Accepted Answer

The answer of Which of the five rules for evaluating...

Question 2

A fallacy of the undistributed middle is a violation of which of the following rules for evaluating categorical syllogisms? In a valid standard-form categorical syllogism¼

Accepted Answer

A)  there are exactly three terms, and each term must be used with the same meaning throughout the argument. 
B)  the middle term is distributed in at least one premise. 
C)  a term must be distributed in the premises if it is distributed in the conclusion. 
D)  if the conclusion is particular, then at least one of the premises must be particular.

Question 3

Put the following categorical syllogism into standard form and identify its mood and figure.
No coal tar derivatives are nourishing foods, because all artificial dyes are coal tar derivatives and no artificial dyes are nourishing foods.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 4

The Venn diagram representation of "All sailors are pirates" is which of the following?

Accepted Answer

Question 5

Put the following categorical syllogism into standard form and identify its mood and figure.
No reticulocytes are leukocytes, but all phagocytic cells are reticulocytes. Whence it follows that no phagocytic cells are leukocytes.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 6

Put the following categorical syllogism into standard form and identify its mood and figure.
Whereas all Klingon warriors are ferocious opponents and some Klingon warriors are not male, it must be that some ferocious opponents are not males.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 7

Evaluating the validity of a sorites requires that we identify all its subconclusions.

Accepted Answer

A) True 
 B)False

Question 8

The predicate term of the conclusion in a standard form categorical syllogism is called the

Accepted Answer

A)  major premise. 
B)  minor term. 
C)  middle premise. 
D)  major term.

Question 9

The following categorical argument form has more than three terms: "All P are M. Some non-S are M. So, no non-S are non-P." Reduce the terms to three by removing term-complements via applications of conversion, obversion, and/or contraposition.

Accepted Answer

The answer of The following categorical argument form has more...

Question 10

Rewrite the following argument as a standard-form categorical syllogism; then identify its mood and figure: Some spaniels are not good hunters, though all spaniels are gentle dogs. Thus, no gentle dogs are good hunters.

Accepted Answer

The answer of Rewrite the following argument as a standard-form...

Question 11

Put the following categorical syllogism into standard form and identify its mood and figure. Some parrots are not pests. All parrots are pets. Thus, no pets are pests.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 12

In a standard-form categorical syllogism, the minor premise always comes first.

Accepted Answer

A) True 
 B)False

Question 13

Put the following categorical syllogism into standard form and identify its mood and figure.
No Starships are Ferengi inventions because all Warp-capable ships are Starships and no Ferengi inventions are Warp-capable ships.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 14

Which of the five rules for evaluating syllogisms can you use to determine whether the following form is valid?
All M are P. All M are S. Some S are not P.

Accepted Answer

The answer of Which of the five rules for evaluating...

Question 15

When forced to choose between adding a false premise and making an enthymeme clearly invalid, we adopt the practice of adding a false premise and thereby making the syllogism valid.

Accepted Answer

A) True 
 B)False

Question 16

Put the following categorical syllogism into standard form and identify its mood and figure.
Some spaniels are not good hunters, though all spaniels are gentle dogs. Thus, no gentle dogs are good hunters.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 17

The predicate term of the conclusion is the major term of a standard form categorical syllogism.

Accepted Answer

A) True 
 B)False

Question 18

Put the following categorical syllogism into standard form and identify its mood and figure.
All storm troopers are metalheads, so some storm troopers are not ballet afficionados, since some ballet afficionados are metalheads.

Accepted Answer

The answer of Put the following categorical syllogism into standard...

Question 19

A categorical statement has existential import when (and only when) it implies that its subject terms only denote classes that have at least one member (i.e., are nonempty).

Accepted Answer

A) True 
 B)False

Question 20

When removing term-complements, which of the following is a permissible change?

Accepted Answer

A)  changing "Some S are P" to "Some non-P are non-S" 
B)  changing "All S are P" to "Some P are S" 
C)  changing "Some S are not P" to "Some non-P are not non-S" 
D)  changing "No S are P" to "Some S are not P"

Exam 6: Categorical Logic: Syllogisms

Which of the five rules for evaluating syllogisms can you use to determine whether the following form is valid? All M are P. All M are S. So, all S are P.

A fallacy of the undistributed middle is a violation of which of the following rules for evaluating categorical syllogisms? In a valid standard-form categorical syllogism¼

Put the following categorical syllogism into standard form and identify its mood and figure. No coal tar derivatives are nourishing foods, because all artificial dyes are coal tar derivatives and no artificial dyes are nourishing foods.

Put the following categorical syllogism into standard form and identify its mood and figure. No reticulocytes are leukocytes, but all phagocytic cells are reticulocytes. Whence it follows that no phagocytic cells are leukocytes.

Put the following categorical syllogism into standard form and identify its mood and figure. Whereas all Klingon warriors are ferocious opponents and some Klingon warriors are not male, it must be that some ferocious opponents are not males.

Evaluating the validity of a sorites requires that we identify all its subconclusions.

The predicate term of the conclusion in a standard form categorical syllogism is called the

The following categorical argument form has more than three terms: "All P are M. Some non-S are M. So, no non-S are non-P." Reduce the terms to three by removing term-complements via applications of conversion, obversion, and/or contraposition.

Rewrite the following argument as a standard-form categorical syllogism; then identify its mood and figure: Some spaniels are not good hunters, though all spaniels are gentle dogs. Thus, no gentle dogs are good hunters.

Put the following categorical syllogism into standard form and identify its mood and figure. Some parrots are not pests. All parrots are pets. Thus, no pets are pests.

In a standard-form categorical syllogism, the minor premise always comes first.

Put the following categorical syllogism into standard form and identify its mood and figure. No Starships are Ferengi inventions because all Warp-capable ships are Starships and no Ferengi inventions are Warp-capable ships.

Which of the five rules for evaluating syllogisms can you use to determine whether the following form is valid? All M are P. All M are S. Some S are not P.

When forced to choose between adding a false premise and making an enthymeme clearly invalid, we adopt the practice of adding a false premise and thereby making the syllogism valid.

Put the following categorical syllogism into standard form and identify its mood and figure. Some spaniels are not good hunters, though all spaniels are gentle dogs. Thus, no gentle dogs are good hunters.

The predicate term of the conclusion is the major term of a standard form categorical syllogism.

Put the following categorical syllogism into standard form and identify its mood and figure. All storm troopers are metalheads, so some storm troopers are not ballet afficionados, since some ballet afficionados are metalheads.

A categorical statement has existential import when (and only when) it implies that its subject terms only denote classes that have at least one member (i.e., are nonempty).

When removing term-complements, which of the following is a permissible change?