That is not a proper test. And please, I am not the coward here.
Besides, what makes you think that I can't write a holy book? The problem is that you would simply deny it. That is why your test is unreasonable.
Your test cannot rely on the actions of others. So one more time, what reasonable test would show you to be wrong.
Ok so you create a Holy Book which we name the cause and then we wait and see its effect upon humanity. Very simple and straight forward. A book at least the size of say any one of the Gospel writers. Then it gets announced and we wait and monitor the effect.