What is a good Argument?
Strong Argument
IF all the premises are true, the conclusion follows with HIGH PROBABILITY.
Example
The distinction between strong and weak argument is a MATTER OF DEGREE.
Is an argument that give good reasons to believe the conclusion.
All the premises must be true.
Truth condition
Regarded as TRUE by MODERN audiences.
Regarded as FALSE by MEDIEVAL audiences.
The conclusion must follow from the premises.
Logic condition
YES
The argument SATISFIES the logic condition.
NO
The argument DOES NOT SATISFIES the logic condition.
Valid Argument
IF all the premises are true, the conclusion CANNOT be false.
This is an example of an invalid argument: the premises are true but the conclusion is false.
The distinction between valid or invalid argument is a SHARP.