Valid argument Forms

Question 1

Valid form #1 (Affirming the Sufficient)

Answer 1

A –> B
A
_______
B

Question 2

Valid form #2 (Denying the Necessary)

Answer 2

A –> B
/B
_____
/A

Question 3

Valid form #3 (The Transitive)

Answer 3

A –> B –> C
_____
A –> C

Question 4

Valid form #4

Answer 4

A some B –> C
_____________
A some C

Question 5

Valid form #5

Answer 5

A -most-> B –> C
_______________
A -most-> C

Question 6

Valid form #6

Answer 6

A –> B
A –> C
_______________
B some C

An often overlooked corollary to this valid form is the following:
A –> C
B –> C
_______________
/A some /B

Question 7

Valid form #7

Answer 7

A –> B
A some C
_______________
B some C

Question 8

Valid form #8

Answer 8

A –> B
A -most-> C
_______________
B some C

Question 9

Valid form #9

Answer 9

A -most-> B
A -most-> C
_______________
B some C