However I argue that the question by itself is fine: it is well defined and has only one reasonable answer. No one presented any other sensible answer so far.
My problem with the whole discussion here is that I actually fail to come up with an ambiguous answer to this question that I subjectively find reasonable. Can you positivity contribute by providing an alternative interpretation that you personally would find more plausible? Otherwise complains about subjectively are hollow. Everything is subjective but it only matters in cases people actually disagree.
> ...attempts to fully remove ambiguity are often harmful.
Really? I'd like to see some real-life examples that are not just further examples of bad question-writing. Regardless, this is beside the point here, where there is a seemingly insurmountably high bar for making the case that removing ambiguity would make the situation worse (to be clear, the problem with tests like this is not just that an examiner might screw you, but that they are intended to be used that way.)