Characters
It is difficult to answer when one does not understand the question.
— Ambassador Sarek ‧ Star Trek IV: The Voyage Home
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker points out a simple obstacle: a reply is hard to give when the question itself makes no sense to the person asked. The remark is dry and measured, placing the difficulty in the unclear question rather than in any lack of willingness to answer.
Context reviewed