Bunuel wrote:
When it snows, Jana stays home; but it hasn't snowed recently, so Jana must not be home.
Which of the following arguments is logically most similar to the one above?
(A) When people complain about their health, they get old; but no one is complaining about their health, so no one must be getting old
(B) When a town has health problems, so it must have many old people
(C) When a town has people complaining about their health, it must also have old people; our town has many people complaining about their health, so it must have many old people
(D) When people are old, they complain about their health; but our town has no health problems, so it must have no old people
(E) When people are old, they complain about their health; but one can complain about one's health and yet not be old
When it snows(A), Jana stays home(B); but it hasn't snowed recently(~A), so Jana must not be home(~B).
A->B; ~A->~B is the logic
(A) When people complain about their health(A), they get old(B); but no one is complaining about their health(~A), so no one must be getting old (~B)
A->B; ~A->~B is the logic
(B) When a town has health problems, so it must have many old people
(C) When a town has people complaining about their health(A), it must also have old people(B); our town has many people complaining about their health(A), so it must have many old people(B)
A->B;A->B
(D) When people are old(A), they complain about their health(B); but our town has no health problem(~B)s, so it must have no old people(~A)
A->B;~B->~A
(E) When people are old(A), they complain about their health(B); but one can complain about one's health(B) and yet not be old(~A)[/quote]
A->B;B->~A
IMO A