Board Thread:S,R,&G/@comment-153.150.21.222-20170301065626/@comment-28391659-20170301160830

If we use http://swordartonline.wikia.com/wiki/Reference_Guideline#Reference_priority to determine "canon". I would say that if there are a contracting fact, we would use the highest priority, which is the LN, else, we use that only source. So, in this case, I would say that the part where Kirito stated Asuna is his second love is not canon, but the other part of the interview would be canon since there is no contracting fact. And I would consider Progressive as an alternate universe separated from the main series.

and for the couple more questions, I can't really answer right now, maybe another time. Hope you understand.