Many Orthodox Jews point to the so-called "Kuzari Principle" is bolstering their beliefs in the Torah. The Kuzari principle is based on the medieval works of the Jewish philosopher Rabbi Yehuda Halevi. It purports to ‘prove' that events of the Jewish exodus from Egypt are plausible and reasonable. The proofs offered are actually simple and are outlined as follows:
The Kuzari Principle: Let us say that one or more significant events occur over a short period of time. These events can be the parting of a sea, or the descent of God to the top of a mountain and the giving of a holy document. These events, because of their enormity, would have left a lot of easily identifiable evidence. Thus, to logically illustrate the principle of Kuzari, as one internet site framed it, paraphrasing from Dr. Dovid Gottlieb's book: Let E be a possible event which, had it really occurred, would have left behind enormous, easily available evidence of its occurrence. If the evidence does not exist, people will not believe that E occurred.
Now let E be the Sinai revelation; since it is claimed that 3 million Jews saw the revelation, and since the 3 million Jews raised no objection once this claim was made, then necessarily the fact of revelation did occur. If Moses falsely claimed that he parted the sea, if he claimed that 3 million people crossed the Sea of Reeds, well, then the 3 million people would have said to Moses "no, you did no such thing. We don't remember crossing a parted sea - you are a liar!" But since the Jewish people of the time did no such thing and believe the revelation and the desert story, then the story is plausible, even probable.
I do hope that I have done some justice to the Kuzari Principle. If I have not, I do apologize. Please correct me if I am not understanding this principle.
But here is my issue with the principle: All of the events that the Jews have witnessed are chronicled in the 5 books of the Torah. The parting of the sea, the revelation at Sinai, Manna from heaven, miracles, etc., are all in the 5 books. These 5 books were all written by Moses according to orthodox Jews. The 5 books describe events from creation up to the death of Moses. Thus, at the earliest, the 5 books of the Torah had to have been completed at the time of the death of Moses.
At the earliest, Torah's claims would have been presented to the Jewish people - the so-called 3 million witnesses - shortly after the death of Moses. At that time, the Jews would have already crossed the Jordon River, being led by Joshua, preparing for the battles for the land of Israel. Joshua, or a priest would have shown the newly finished 5 books to the Jewish people.
Now, note that according to the Torah tradition, all of the people who originally left Egypt, some 3 million people, died in the desert. No one, except for Joshua and Caleb who crossed the parted sea actually made it to the Jordon River. They died of plagues, battles, God's wrath, purges etc. Not even Aaron or Moses made it to the land of Israel.
Those who made it to the Jordon River were the second generation of the exodus. Again, if I am wrong about this, please tell me.
Now, when the Torah is presented to the second generation, and the various miracles etc. are mentioned, the people would have no way of verifying the veracity of the claims since THEY WERE NOT THERE! As you know, the Torah was given 49 days after the exodus. All the people who witnessed the revelation at Sinai would have been dead by the time the Torah was completed 40 years later! Of course Caleb and Joshua are exceptions to this.
Note, then, that the Kuzari Principle is no longer valid in the case of Jewish exodus. The only witnesses to Torah's claims were Joshua and Caleb. There are only 2 witnesses to a purported event. I will not go into the obvious interest of these two to support the claims of the bible. I will only mention that there were not 3 million witnesses, nor 10,000. Rather, there are only 2 witnesses to the multitude of miraculous events that Jews say occurred.To summarize, at the time when the Torah made its supernatural claims, there were only 2 witnesses available to verify such claims. These claims, then, are no different from claims of other religions. The veracity of the Torah is no more witnessed than that of Mohammad's Quran or Smith's Mormon Bible.