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Hypothetical syllogism
BSU
17
Philosophy
Undergraduate 1
03/05/2013

Additional Philosophy Flashcards

 


 

Cards

Term
Modus ponens
Definition

If p then q 

p

therefore, q 

 

it is valid. 

Term
Modus tollens
Definition

If p then q 

not q 

therefore not p 

 

it is valid

Term

affirming the consequent 

 

Definition

if p then q 

Q

therefore p 

 

 

it is NOT valid. 

Term
Denying the antecedent.
Definition

If p then q 

not p 

therefore not q 

Term
Chain argument
Definition

If p then q 

if q then r 

therefore if p then r 

Term
if p then q, q
Definition
Is necessary for p
Term
If p then q, p
Definition
Is sufficient for q
Term
Necessary conditions are always on what side of a conditional?
Definition
The consequent "then" side.
Term
What would make x a necessary condition for y?
Definition
Whenever y is the case, x must also be too.
Term
What makes x a sufficient Condition for y
Definition
if x is true then y must also be true.
Term
Unless x, y
Definition
if not x then y
Term
Some inductive arguments are valid.
Definition
FALSE. ALL INDUCTIVE ARGUMENTS ARE FALSE.
Term
if a valid argument has a false conclusion then it must have at least one false premise
Definition
true
Term

If p then q 

not p 

therefore q 

 

Definition
denying the antecedent
Term

If p then q 

not q 

therefore not p 

Definition
Modus tollens
Term
a conditional is false if and only if it's antecedent is true and it's consequent is false.
Definition
True
Term
only if
Definition
Consequent of a conditional
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