It happens again and again that you simply cannot decide between the answer options, or simply have a neutral opinion upon the given topic when voting.
Open questions, i.e., entering answers in a free text field, are currently not possible.
However, participants can be shown an answer option "Neither" and after participation, a form is loaded with a free text field (and possibly also other fields, e.g., for the participant's e-mail address) that the participant can fill in and submit.
I built a demo for you: