To Verbal Expert........CR Inference

Mo2men wrote:Of all the high schools in the United States, Judd Academy is the one with the largest number of alumni serving in the Air Force. Knoxworth High School, however, is the school with the most graduates serving in the military as a whole, including the Army, Navy, Air Force, Marines, and Coast Guard.
Which of the following, if true, is most clearly supported by the statements above?
(A) Knoxworth is the most patriotic town in the nation.
(B) Judd Academy has fewer graduates serving in the Navy than does Knoxworth High School.
(C) Judd Academy has a higher percentage of alumni serving in the Air Force than does Knoxworth High School.
(D) Some graduates of Knoxworth High School are serving in the military but not in the Air Force.
(E) Knoxworth High School is the school with the second-highest number of alumni serving in the Air Force.

Premise: Judd has the highest Airforce serving alumni.
Knoxworth hhas most graduates serving in Military including Army, Navy, Marines and Airforce

Coming to the options:

(A) Knoxworth is the most patriotic town in the nation.
Simply out of scope.
INCORRECT

(B) Judd Academy has fewer graduates serving in the Navy than does Knoxworth High School.
We do not know anything about the Navy graduates from Judd Academy
INCORRECT

(C) Judd Academy has a higher percentage of alumni serving in the Air Force than does Knoxworth High School.
We do not know the total strength at both the academies, hence we cannot comment on the percentages.
INCORRECT

(D) Some graduates of Knoxworth High School are serving in the military but not in the Air Force.
This we know for sure as there are people from Knoxworth who serve in all the branches of Military. Hence there would be people who serve for Navy, Marines or Army but not Airforce
CORRECT

(E) Knoxworth High School is the school with the second-highest number of alumni serving in the Air Force
Cannot comment on this too without any information about other schools.
INCORRECT

Correct Option: D

Mo2men wrote:Of all the high schools in the United States, Judd Academy is the one with the largest number of alumni serving in the Air Force. Knoxworth High School, however, is the school with the most graduates serving in the military as a whole, including the Army, Navy, Air Force, Marines, and Coast Guard.
Which of the following, if true, is most clearly supported by the statements above?
(A) Knoxworth is the most patriotic town in the nation.
(B) Judd Academy has fewer graduates serving in the Navy than does Knoxworth High School.
(C) Judd Academy has a higher percentage of alumni serving in the Air Force than does Knoxworth High School.
(D) Some graduates of Knoxworth High School are serving in the military but not in the Air Force.
(E) Knoxworth High School is the school with the second-highest number of alumni serving in the Air Force.

An inference is a statement that MUST BE TRUE, given the information in the passage.
One approach is to apply the NEGATION TEST.
When the correct answer choice is negated, the passage will be contradicted.
The opposite of some is NONE.

D, negated:
NO graduates of Knoxworth High School are serving in the military but not in the Air Force.
In other words:
ALL military graduates of Knoxworth High School are in the Air Force.
The passage states that Knoxworth has the most military graduates.
Thus, if the negation of D is true, then Knoxworth must also have the most AIR FORCE graduates -- CONTRADICTING the passage's contention that JUDD ACADEMY has the largest number of alumni serving in the Air Force.
Since the negation of D contradicts the passage, D is the correct inference: a statement that MUST BE TRUE, given the information in the passage.

The correct answer is D.