Is there a word for a question whose phrasing renders its answer essentially useless?
Solution 1:
I would classify some of the questions where the answer is known but the question is not apparently rhetorical as 'manipulative'.
Your example, 'Is this possible?', may be asked in 2 contexts:
- feasibility in general, based on practices
- the respondent's preliminary readiness, ability, confirmation, and agreement to undertake a task.
In the first case, an alternative wording may be 'Is this feasible?', while the second case can be replaced with 'Can you do it?'.
If the asker knows it is feasible and the respondent is capable of the implementation, then the question is a manipulative way to make the respondent share the responsibility.