TERM 1
An argument is valid if and only if
DEFINITION 1
it coud not have all true premises and a false conclusion
TERM 2
validity is a matter of what
DEFINITION 2
argument form
TERM 3
if an argument is valid, then
DEFINITION 3
it must have premises that entail its conclusion
TERM 4
if there is entailment in an argument, then
that argument
DEFINITION 4
is truth preserving
TERM 5
if an argument is valid, then the logical
thinker who recognizes its validity knows
what
DEFINITION 5
it is contradictory to accept its premises and deny its
conclusion
