The same way you prebunk things in our modern world.

If the information does not fit the narrative, the information must be fake...

How else will we ensure the safety of our elections and democracy? Don't you know democracy dies in the dark? Don't you know that this is extremely dangerous for our democracy?

Edit: BTW, nothing against what you said, economics seems very similar to the Agile cult to me at this point.

As in any other scientific field: you put forward a theory and if there is enough evidence that does not fit the theory it’s debunked.

In economics, "enough" is hard to assess though. Also, a theory may linger around for a while because it suits the agenda of some people. And I guess many more methodical issues like these.