WTP – That is “Ones” (coercion), not forgetting.
I was assuming that forgetting to light candles would mean that someone forgot about Shabbos altogether, but I just remembered that there are many girls who don’t light candles before they are married, so they wouldn’t necessarily associate Shabbos starting with lighting candles.
Someone who is not used to lighting candles could easily forget to light candles. But I think that if someone like me (who has been lighting candles from the age of 5) forgot to light candles, that would mean that I forgot that it’s Shabbos, since Shabbos starts for me when I light candles, so forgetting one would mean forgetting the other.
I suppose someone could theoretically have an unusually crazy day with emergency situations lo aleinu, and they could forget to light candles, but I still think that is a highly unusually situation.
Has anyone out there ever heard of anyone forgetting to light candles (not “ones” but forgetting)?
Maybe a Yomtov going into Shabbos could be a situation where someone might forget?
Or maybe a doctor or nurse who is working on Shabbos?