> I’m not asking what someone should do, but what your average person would do.
I guess I misunderstood your question then. I thought you were responding to, "Logically, distrusting The Lancet means distrusting Wakefield's paper too."
I think we've already established what an average person would do: not revise their beliefs in light of new evidence.
> To circle back to the point, people aren’t capable of understanding any independent confirmation, nor are the capable of understanding the explanation for the change in position. The operation of science is incomprehensible to most people.
I think this overcomplicates the situation, which is just about beliefs, evidence, and changing your mind. And people do change their minds in light of new evidence... about topics to which they're not emotionally attached. It's the emotional attachment to beliefs that causes people to perform mental cartwheels and stand on their heads just to avoid admitting the obvious truth.
For the most part, professional science, its complex math and statistics, operates in a parallel universe to our daily lives. A paper is published in a scientific journal? Shrug. A paper is retracted? Shrug. It may be interesting, a curiosity, but it's largely irrelevant to the average person. They're not emotionally committed to any of it. The problems occur when professional science somehow overlaps with something that they do care deeply about. And their interaction with that scientific work is not even an attempt to analyze it; rather, they simply want to cherry pick scientific results that agree with their preconceived notions, and use (abuse) scientific authority in order to argue for their preconceived notions.
But independent confirmation is not that difficult to understand. Is Jane lying or telling the truth about a particular situation? If you're skeptical of Jane's claims, then you ask John, someone else you know who also has first-hand knowledge of the situation. Average people can't design a scientific experiment, but they can certainly dig deeper into some question. However, you've got to be motivated to dig deeper. Some people want to be lied to, because the truth would be uncomfortable.