First we had the Orthoprax layman, then the Orthoprax Rabbi and now Ami has delivered to us the Orthoprax Posek. I remain unconvinced; It is possible that this fellow is pulling their leg or doesn't exist at all. There is also the possibility that someone is trying to create a "buzz" to sell more magazines.
Emunah is a very difficult topic. Faith is the very opposite of proof. If there would be a proof that Judaism is the one authentic religion, then why wouldn't it follow that everyone would be Jewish!
Elsewhere on the Jblogosphere the "proof" of the 4 species is being discussed. Some see this statement in Talmud Chulin 60B as proof of a divine authorship of the Torah:
אמר רב חנן בר רבא השסועה בריה בפני עצמה היא שיש לה שני גבין ושני שדראות וכי משה רבינו קניגי היה או בליסטרי היה מכאן תשובה לאומר אין תורה מן השמים
Yet if you analyze this statement, you might notice that it doesn't say that there is a proof. All it says is that there is a Teshuva; an answer. What the Talmud may be telling us here is this: Nobody has any proof that their religion is correct. Yet everyone needs, aside from the fact that they were born into it, an answer, a Teshuva, as to the logic of why they follow a particular religion. It needs to make sense.
As to whether this "proof" is actually referring to the Shesuah, the 4 single Simaned animals, or something else entirely, may be the topic of another post someday.