Liable to more than one interpretation
Not affording certainty
Not clearly perceived or perceptible
It was unclear if this action was prompted by Patsy Boyd herself or just some do-gooder trying to clear her desk of problems.
Whether he was trying to escape or attack Alex was unclear, but Alex reached the door at the same time the man did.
Whether he meant she looked good or literally cool was unclear, but his smile was definitely supportive.
And it would avoid awkward places where it's unclear if the category is for a modern or a historical entity.
It was unclear whether she was another victim, or instead an accomplish to his homicidal violence.