A question for Robert...
Q: How do I know that someone who's telling me what to do knows what they're talking about?
A: If I may re-phrase the question... What is my most readily available criterion for judgement? To see what someone does. Not what they say they do, but their actions in life. We may infer reasons for their choices and decisions, even if they are themselves unaware of them. But what these decisions are is shown most clearly by the actions that followed.