Yes, if the unresolved point could materially change the decision.

A strong recommendation is decisive about what the evidence supports while being honest about what still needs validation.

Do not turn the ending into a long list of missing data. Name the one or two uncertainties that matter most and convert them into concrete next steps.

For example: "I would enter the market, subject to confirming customer acquisition cost because that is the main assumption driving profitability." That preserves a clear recommendation while showing that you understand the decision risk.

I used to hide uncertainty because I thought it sounded weak. Framing it as the next thing to validate was much stronger.

The important part is keeping it to the uncertainties that could actually change the answer.