Board Thread:Naruto Discussions/@comment-25645405-20141128183407/@comment-3279282-20141202211238

Then how do they fit into the explanation? They are not elemental chakra, they don't work like natural chakra and they can be combined without a Kekkei Genkai. Yin Release and Yang Release are by no means elemental chakra natures and Kakashi only talked about those. The very fact that they postponed the explanation of Yin and Yang is evidence enough, man. If they would fit into that explanation, there would've been seven natures in Yamato's diagram, not five.

It's not bad logic, it's the truth. A fictional work only exists in the form it was given to us. There's nothing happening while we're not reading it as long as it wasn't told to us. And since the manga is over, there will probably never be any more revelations about most things. The "evidence of absence" argument works in real world with real people, but not in fictional work.