LR - Valid & Invalid Arguments Flashcards
A —> B
A
____________
B
Valid 1
(Affirm the Sufficient)
A —> B
/B
____________
/A
Valid 2
(Negate the Necessary)
A —> B —> C
___________
A —> C
Valid 3
(Transitive)
A some B —> C
___________
A some C
Valid 4
A most B —> C
___________
A most C
Valid 5
A —> B
A —> C
___________
B some C
Valid 6
A —> C
B —> C
___________
/A some /B
Valid 6
(Corollary)
A —> B
A some C
___________
B some C
Valid 7
A —> B
A most C
___________
B some C
Valid 8
A most B
A most C
___________
B some C
Valid 9
A —> B
B
____________
A
Invalid 1
(Affirm the Necessary)
A —> B
/A
____________
/B
Invalid 2
(Negate the Sufficient)
A —> B some C
___________
A some C
Invalid 3
A —> B most C
___________
A most C
Invalid 4
A some B some C
___________
A some C
Invalid 5
A most B most C
___________
A some C
Invalid 6
A some B
A some C
___________
B some C
Invalid 7
