NDSU Logic 257 Questions and Answers
logic
is the study of methods for evaluating whether the premises of an argument adequately support (or provide good evidence for) it's conclusion.
argument
is a set of statements where some of the statements are intended to support another
Pr...
NDSU Logic 257 Questions and Answers
logic - answer is the study of methods for evaluating whether the premises of an
argument adequately support (or provide good evidence for) it's conclusion.
argument - answer is a set of statements where some of the statements are intended
to support another
conclusion - answer is the claim to be supported
premises - answer are the statements offered in support
statement - answer is a declarative sentence that is either true or false
A statement is true because... - answer because it describes things as they are
A statement is false because... - answer because it describes things as they are not
deductive argument - answer is one in which the premises are intended to guarantee
the conclusion
inductive argument - answer is one in which the premises are intended to make the
conclusion probable, without guaranteeing it.
deductive logic - answer is the study of methods for evaluating whether the premises
of an argument guarantee its conclusion
inductive logic - answer is the study of methods for evaluating whether the premises
of an argument make its conclusion probable, without guaranteeing it.
valid argument - answer is one in which it is necessary that, if the premises are true,
then the conclusion is true
invalid argument - answer is one in which it is not necessary that, if the premises are
true, then the conclusion is true
sound argument - answer is a valid argument with all true premises
sound - answer valid + all premises true
unsound argument - answer is one that either is invalid or has at least one false
premise
argument form - answer a pattern of reasoning
, substitution instance - answer of an argument form is an argument that results from
uniformly replacing the variables in that form with statements (or terms)
valid argument form - answer is one in which every substitution instance is a valid
argument
formally valid argument - answer is one that is valid in virtue of its form
Condtional Statement - answer is an if-then statement
antecent - answer the "if-part" of a conditional statement
consequent - answer the "then-part" of a conditional statement
modus ponens - answer the mode or way of posting
This is what famous form?
1. If A, then B
2. A
So, 3. B - answer modus ponens
This is what famous form?
1. If A, then B
2. Not B
So, 3. Not A - answer modus tollens
Modus Tollens - answer the mode or way of removing
negation - answer the negation of a statement is its denial
ex: it is "not the case" that A.
Hypothetical Syllogism - answer to reason together
This is what famous form?
1. If A, then B
2. If B, then C
So, 3. If A, then C. - answer hypothetical syllogism
disjunction - answer is an either-or statement
This is what famous form?
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