Ura Mamoru said:
PCHeintz72 said:
Hmmm...á Raa is apparently using the Visual Novel continuity...á so she really is his cousin in this one.
Wasn't that from a light novel, not a visual novel?
And I think Akamatsu confirmed that it applies to the manga as well in a databook released after the end of the series. I remember us having a thread here discussing the contents of said databook, and some of the things it clarified within (including that above-mentioned cousin/aunt thing, what's up with Kanako's cat talking, and why Motoko is scared of turtles).
It directly says it's canon in the afterword of the first novel, by Akamatsu himself.
IIRC, there was an argument on this board over wither word of god like that can truly be considered canon. I believe it resulted in some reducto ad absurdum arguments saying stuff like 'if he declared Mutsumi to be a space alien, would that be canon?' and such.
Basically, some believed only the contents of the original manga is canon, everything else is not, in terms of manga canon. So the novels, even if they say they should be taken as manga canon, are not canon, even if the author wishes them to be.