I have been reading up on the sheva mitzvos bnei Noach and the idea that there are 7 laws, but it seems that according to one sense, there must be eight. If not, can a "Noachide" be successful as a Noachide if he only keeps the known 7?
If one can only be "credited" for following them because they are a commandment (as per this, though I don't know how to link to the answer, and the answer doesn't have a clear source), and
if the laws are as stated, not including any rabbinically added ones (as stated here in the first answer, quoting the Mishneh laMelech)
then it seems that an implicit 8th law is the acceptance of the Torah as divine and authoritative and the rabbinical exegesis as valid and applying to the non-Jew (otherwise, how could we end up with lists like this and this and expect them to be listened to in light of the "no rabbinically added ones"?)
Is it possible for someone to reject the torah as divine or the rabbinical framing of the laws as more than just the work of men and still, as he believes in god and in an inherent morality hardwired into humankind which can be codified in those 7 laws, to be a proper Noachide?
Note -- I am not talking about someone who rejects god or is involved in a religion which might be called idolatry as in this, but someone who is a deist, mnonotheist, call it what you will, but rejects the Torah and authority of the rabbis.