The guiding principle of reductio ad absurdum is that

A. whatever implies a contradiction is false.
B. systems of natural deduction often lead to absurd conclusions.
C. it is not always possible to reduce a set of statements to absurdity.
D. often the most straightforward method for deriving a contradiction is by assuming an absurdity.


A. whatever implies a contradiction is false.

Philosophy & Belief

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Mackie's response to the claim that good cannot exist without evil is

A) this kind of God has a sick sense of humor. B) it misunderstands the definition of evil. C) this response is correct. D) this response limits God's power.

Philosophy & Belief

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

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

Philosophy & Belief

The two types of knowledge are

A) epistemological and ontological B) practical and theoretical C) positive and negative D) relative and universal

Philosophy & Belief

On his theory of the wrongness of abortion, Marquis argues that it

is wrong to kill fetuses because they are persons.

Indicate whether the statement is true or false.

Philosophy & Belief