Question

10. Since "All Greeks are human" goes over into logical notation as "Vx (Gx-Hx)." it is tempting to imagine that "Some Greeks are human" goes over as b instead of as a. (a) 3x (Gx & Hx) (b) 3x (Gx-Hx) To see why a is the right translation, work out the trees for the in ferences from a to b and b to a, and think about the counterexamples, i.e., cases in which b is true but a is false. (Draw circle diagrams.) Would you say that any of those are cases in which some G's are H's?

Answer 1

Giv 舟11 Greeks are human/ are -Alt- ld not be possble. AS 194

Orn호 ntre dict A Case ON)