It seems to me, for example, take Pretrib. There might be millions that believe that doctrine to be true, rather than just one person believing it to be true. This would still be an example of a private interpretation regardless that millions are interpreting it in the same manner. A private interpretation involves doctrines not found in the Bible. Clearly, though Pretribbers disagree of course, Pretrib is not found in the Bible, thus a private interpretation.
And the same is true of Premil vs Amil since both views can't be true. Assuming one of those positions is true, the one that is not true, it is a private interpretation. Except none of us can actually undeniably prove which position is true and that we all won't know that until the 2nd coming happens first. In the meantime we have both views insisting their view is correct. This will no longer be an issue once Christ returns and settles this debate once and for all.
