Making mistakes is an important part of the learning process. When something doesn’t work look at what was wanted vs delivered, get some input, make some adjustments and keep going. Fail fast and fail forward.
No doesn’t always mean no but when it does be clear and concise about why and the risks or implications if the decision is to do it anyway.
Many obstacles disrupt objectivity. Don't be distracted by noise pollution. Focus attention on the problem statement and quality factual data.
Objectivity
No
Mistakes