Earlier quoted context omitted.
I managed to successfully complete the (a) flow, but it was considered not enough, due to the different IP, and minor inaccuracy with the creation date. I later managed to successfully complete the (b) flow due to the SMS. I believe Google isn't using a binary definition of success, but a confidence interval of how sure they are you are the actual owner - if they are reasonably sure you are the owner, less questions…
> I managed to successfully complete the (a) flow, but it was considered not enough, due to the different IP, and minor inaccuracy with the creation date. That's exactly what I mean though. You didn't answer their questions correctly. It wasn't just due to your location/IP; you put in the wrong date. (It's quite funny/ironic that you are also answering my questions incorrectly and yet insisting otherwise. While I sym…
There is no "wrong" or "right" date for Google. Google's support says to input whatever date you remember, Google will judge it as neither "true" or "false", but based on how close you are, and (this part is now speculation) combine that with other factors.