True Premis
Negation
wff has to be false
Negation
wff has to be true
Tautology Definition
Column of all T's
Conditional
if the antecedent is false and/pr the consequent is true
Conditional
if the antecedent is true and/or the consequent is false
Equivalent definition
All values are the same
Biconditional
if both parts are the same
Biconditional
If both parts are different
What has to happen in order for something to be valid?
no rows of will all true premises and false conclusion
Conjunction
both parts have to be true
Conjunction
Both parts have to be different and/or false
Contingent Definition
column with at least 1 T and 1 F
Disjunction
if at least one part or both are true
Disjuntion
both parts are false
Consistent Def
at least one row in which each wff is true