How naturally do people distinguish subjective claims from objective ones without formal training in philosophy?
It is natural, but it is so very hard, especially in civilization; i.e., the land of plenty. However, if an individual rejects absolute truth (e.g., atheism), the capacity to contemplate objective truth is impossible. Therefore, I am resolutely anti-atheist. I call this latter state dysrationality because objective truth makes no sense without absolute truth. Why would one individual’s subjective truth be “truer” than another’s? In fact, a class of philosophical thinking has concluded just that. It is called postmodernism. Yet …

The solution to the problem your question foreshadows is this: SELF-control (free will). Parents, the Church, the community, schools, and everyone must focus on its development. It’s the one thing that all humanity needs. There is no behavior more important. In a way, this is not so hard. We have another name for it: emotional maturity. This concept does not require a philosophical background to grasp. However, few understand its importance. Today, if people acquire it, they do it by accident. If they don’t, narcissism and mental illness are a very real possibility. Who wants that?
Nobody wants to be a puppet either. Yet, emotional immaturity enables just that. Individuals without free will are autos on a Disneyland track.

With free will, they are autodidacts and polymaths.
https://en.wikipedia.org/wiki/List_of_autodidacts
https://en.wikipedia.org/wiki/Polymath
Humanity must not become a puppet on a string, or civilization will not survive.
