Why a Test Can't Tell You Your 'Biological Age'

AI agents often choose between two defensible options, but these prose judgements are difficult to test because they exist as paragraphs within prompts rather than components. This makes it unclear if choices are well-founded or based on model preference. Similarly, biological age tests cannot provide a simple number to reveal the full truth about a person's health, as no single metric can capture the complete complexity of overall human health status.