Given below are two premises and four conclusions drawn from those premises. Select the code that expresses conclusion drawn validly from the premises (separately or jointly).
Premises:
(a) All dogs are mammals.
(b) No cats are dogs.
Conclusions:
(i) No cats are mammals.
(ii) Some cats are mammals.
(iii) No dogs are cats.
(iv) No dogs are non-mammals.
Codes:
1
(i) only
2
(i) and (ii)
3
(iii) and (iv)
4
(ii) and (iii)