No nuance. No "it depends". For as many of these examples as you feel like answering, ask yourself if you think it is a "mahjong variant" or not.
You are not expected to answer every question. The questions are in a random order, so please only fill out however much of the poll you feel like filling out, and please skip any questions you do not have answers to. It shouldn't matter if you stop partway through and skip to the end to click "submit".
I don't intend on doing anything with this data, it is just for fun. Please only take this poll once, it'd mess with the data if you do so more than once!
More may be added to this list over time.