<p>is it </p>
<p>not me</p>
<p>or not I</p>
<p>in response to a question?</p>
<p>thanks</p>
<p>It depends. The difference between "I" and "me" is the case, which is the pronoun's relationship to the verb. "I" is in the subjective case, which means that it can only be used as the subject of a verb (real or implied) or as part of a predicate nominative. "Me" on the other hand is in the objective case, which means it can only be used as the direct or indirect object of the verb.</p>
<p>So, if the question is, "Who wants cake?" The correct response is "Not I," because the "I" is being equated with the "Who" in the question, which is the subject of the verb "wants."</p>
<p>If the question is, "To whom should I give this last piece of cake?" the correct response is "Not me," because the "me" is being equated with the "whom" in the question, which is the indirect object of the verb "give."</p>
<p>i think it's "not i"</p>