If someone wishes to posit that since the Sanhedrin knew 70 languages (or knew how to calculate the calendar, etc.) so did the hamon hoam know it as well, YOU have to show that. The Sanhedrin or Beis Din having that knowledge doesn’t demonstrate the hamon hoam did as well.
I know that this is going to seem like apikursus to even suggest such a thing, but I would think that at least some of the hamon am must have had the knowledge. Else how did the Sanhedrin recruit new members?
The Wolf