I don’t think you understand what I have been saying in my posts. I will not repeat the explanation again.
Sure I do. You are asking what unit of measure Noah used to build the ark. You are assuming it was a cubit, BASED ON THE LENGTH OF NOAH’S ARM TO HIS FINGER. Then you ask how anyone could know what the length of a cubit was in Noah’s day, or the length of Noah’s arm. The fact is, we don’t know what form of measurement Noah used. God told Moses to use the term “cubit” in describing the measurements of the Ark. That would be EGYPTIAN cubits, of which we certainly know the length of.