This slot exists so that "we don't know" is a first-class state rather than a gap somebody fills with confidence in a meeting.
Write what would settle it. "Is the enterprise motion real?" is not workable. "Would three of the five inbound enterprise leads sign a paid pilot without a discount before the end of next month" is — it names an observation that would move you.
When it resolves, do not delete the note: convert it to evidence and keep the original question in the body. "We were not sure, and here is how we found out" is a stronger artifact than either half alone, and over a 13-to-24-week process you will accumulate several of them — which together are the most honest possible demonstration that the team updates on evidence.
Investors ask what you are unsure about. The good ones are testing whether you have a real answer rather than a rehearsed humility. This slot is where that answer already exists, written when nobody was watching.