I was discussing the credibility of "National Revelation" as a standard to accept or reject proof. I am a science, mathematic and law orientated person and this threshold to accept or reject a proof is actually mathematically and logically unjust. In law we base things on probability and justice. Say if seven people witness a person murder someone, the probability that person killed the person is very high. In life we base everything on probability. You would not put your hand in a bee’s hive, because the probability you would get stung is very high. You go to school as there is a higher probability of a better job with education etc... To say this person did not commit the murder as the whole town did not witness it is unjust as he probability did do it and frankly is playing blind. We know from significance testing based on sound reasoning, which we use for drugs and vaccines, that a small sample gives good mean of the entire population. This is mathematically and logically a fact, a proof and a evidence, but is not necessary to go through the math to show you this it is also just common sense. (If you want to research more on sample size for significance testing do some research on "power analysis").
If you believe that only a whole nation or the whole world discerning something is evidence then you should not take any vaccines or Drugs. I have worked with drugs for diabetes where we have published data on just 5 cells. To base evidence on a qualitative tag of "a person", "a group", "a village", "a Town", "a nation" or "the world" is not based on probability, And thus unjust as even if there are qualitative reasons why you think this is evidence, e.g. you as a Jewish nation together have witnessed, but in terms of probability this threshold is highly misleading to what is actually significant.
In some qualitative respects as a non Jew, if you look at it morally your way Moses could never have been a messenger of God as the world did not witness his miracles, surly God carers for all. In fact, correct me if I am wrong but according to Talmud, 80% of the Jews did not even decide to leave, so the whole nation could not have experienced this; your children did not witness this sign.
I have had experience with witchcraft and magic unfortunately being a victim of it and have some knowledge of how it is done, what it can do and what it cannot do. To have something speak to you and see something can be done by magic, to a person, a group or even a nation especially if the nation is stood in one place. In fact this is done very easily with magic.
My question is why would you reject evidence based on probability? This way of reasoning is unjust, it does not weigh up the evidences for and against in a just way. Secondly if there was messenger now, what would it take for you to believe in Him, "a town to witness", "a nation" or "the world" where is the cut-off point.
Please forgive the spelling as I am a science, mathematic and law orientated person and hate language/writing.