Academic level, never age. The diagnostic is optional and multidimensional: it does not assign one grade to a person. It produces a competency map, identifies missing foundations, and recommends a route — while the entire open catalog remains visible. Recommendation is not restriction.
Advising law: a learner may be foundational in mathematics and advanced in history at the same time. Enter strong fields at the highest defensible level; repair prerequisites only where the profile shows a gap. Where mastery can be demonstrated, test-out exists.