Board Thread:Naruto Discussions/@comment-36755597-20180829215104/@comment-1512913-20180906213721

It's because in all likelihood non-canonical novel (who knows) suggested another possibility. And it's not like the canon never redefined itself before. First Izanagi required both Senju and Uchiha naughty bits grinding against each other, later just Uchiha naughty bits alone for example. Kekkei Tota being 3 natures doesn't necessarily deny the possibility of it being 2 kekkei genkai merged together, if they share a common nature. For example Wood + Ice would be 3 natures as well in theory, earth+water+wind.

Onoki also has Lava Release in a novel supposedly, assuming someone didn't pull that from their arse. Which is a better possibility, that he has both Kekkei Tota Dust Release and Kekkei Genkai Lava Release or that the latter is a component of his Kekkei Tota, hmph? :)