A hypothetical case (based on a somewhat similar real one): Ben Noah in the process of giyur. Stood before the Beis Din and was asked question 'Will you follow the mitzvot as fully as a goy can up until the end of the process of giyur and completely after the process is done?'. Ben Noah said 'I will'. Will he sin if he won't, as fully as he can (e.g. no 100% observance of Shabbos, etc), observe the mitzvot even before he becomes a ger?
Of course the 'level'/kind of potential sin is not like for a Jew, but could it be considered false statement or maybe oat/vow, assuming the Ben Noah already is fully sure (has the mindset) he will confirm his observance of halakha at the next Beis Din meeting (even though he may not keep his word and follow the guidance of the Beis Din)? Will he be liable to punishment either from Shamayim or from a Beis Din? Remarks:
- Again, this is a hypothetical case.
- Please note rabbinic prohibition against taking oats is not binding for the goyim.
- Please give a reason if you downvote, so I can ask better questions in the future.