Question:
New Zealand is an independent nation within the British Commonwealth.

Does it follow that "New Zealand is within the British Commonwealth."?
Answer:
yes

Question:
Any thinking girl would!

Does it follow that "Any smart woman would."?
Answer:
yes

Question:
At the crucial moment when they make their choices, many of these people honestly believe that money--beyond the cost of upper-middle-class comfort--is not all that important to them, and most of them may turn out to be right.

Does it follow that "Family is more important than money according to many people."?
Answer:
it is not possible to tell

Question:
probably they don't have birth control

Does it follow that "They are taking birth control."?
Answer:
no