If that's the required MO, then I don't see the point in even bothering. Reality is virtually always going to be more complicated than those arrogantly making such basic erroneous assertions are going to be willing to deal with. That attitude of "I'm right no matter what" is driven by deep insecurities that have long since been forgotten as their real motivations after they buried them in overcompensating mountains of false bravado. You can ELI5 all you want, but if they're not as open to learning new things as someone who actually is a 5yo, then odds are extremely high that you'll just be wasting your time.