So first you wrote the argument of "look at this trend, it must be herd immunity because I can't think of any other reason for it". And when someone points that

So first you wrote the argument of "look at this trend, it must be herd immunity because I can't think of any other reason for it". And when someone points that out your response is "of course that's the extent of the analysis I've done, I can't think of another analysis that would prove the point".