2.1A
1. Americans are materialistic because they are exposed to more advertising than any other people
on earth.
Your answer of `nonargument (explanation)' is correct!
2. A person is dead if her brain has stopped functioning.
Your answer of `nonargument (
1.1B
1. All valid arguments have at least one false premise.
Your answer of `False' is correct!
2. An argument is a set of statements where some of the statements, called the
premises, are intended to support another, called the conclusion.
Your answer of
1.3 A
1. Lewis is a famous author only if he knows how to write. But Lewis is not a
famous author. So, Lewis does not know how to write.
Your answer of `DA: denying the antecedent' is correct!
2. If Susan is a famous author, then she knows how to write. M
1.2 B
1. If the solution turns blue litmus paper red, then the solution contains acid. The
solution turns blue litmus paper red. So, the solution contains acid.
Your answer of `MP: modus ponens' is correct!
2. If the solution turns blue litmus paper red,
1.1D
1. All cats are mammals. All mammals are animals. So, all cats are animals.
Your answer of `Sound' is correct!
2. All collies are dogs. Some animals are not dogs. So, some animals are not
collies.
Your answer of `Unsound' is incorrect.
Explanation: A
1.1C
1. If Lincoln was killed in an automobile accident, then Lincoln is dead. Lincoln
was killed in an automobile accident. Hence Lincoln is dead.
Your answer of `Valid' is correct!
2. If Lincoln was killed in an automobile accident, then Lincoln is dead
1.4B
1. All arguments having only true premises are cogent.
Your answer of `False' is correct!
2. All strong arguments are cogent.
Your answer of `False' is correct!
3. All weak arguments are uncogent.
Your answer of `False' is incorrect.
Explanation: An
1.4C
1. Fifty percent of serial killers were abused as children. Bundy is a serial killer.
Therefore, Bundy was abused as a child.
Your answer of `Invalid and Weak' is correct!
2. This lovely china plate is similar in size, weight, and composition to the
7.2 B
1. It is not the case that Abraham Lincoln was born in 1997.
Your answer of `True' is correct!
2. If water is H2O, then water is not wet.
Your answer of `False' is correct!
3. Either New York City is the capital of Montana or Seattle is the capital
7.2 A
1. A C
Your answer of `False' is correct!
2. A C
Your answer of `True' is correct!
3. ~A
Your answer of `False' is correct!
4. B D
Your answer of `False' is correct!
5. D B
Your answer of `True' is correct!
6. A B
Your answer of `True' is correct!
7
7.1 A
1. (A B C)
Your answer of `Not a WFF' is correct!
2. (~B)
Your answer of `Not a WFF' is correct!
3. (~(C) F)
Your answer of `Not a WFF' is correct!
4. (E (~F G)
Your answer of `Not a WFF' is correct!
5. ~(H J) (K L)
Your answer of `Not a WFF' is cor