Board Thread:Theories and Speculation/@comment-26381547-20150509000749/@comment-25093611-20150509195248

Legendary Super Saiya-Jin 4 wrote: @GreatestSin None of them are asspulls really. An asspull is when something that is incredibly unbelievable or illogical happens out of nowhere. Believing that there is another uber powerful dojutsu out there that that exist besides the Rinnegan that Hagoromo's twin brother, Hamura, possessed is believable and logical especially since it's achieved almost the exact same way. not really, "incredible unbelievable" is bound to a readers POV, i find it unbelievable that naruto and sasuke suddenly mastered many nw jutsus out of nowhere but...it happened and nothing in the story said that it wasnt possible to master stuff instantly, only that it is for me incredible unbelievable,

illogical on the other hand are plotholes who shouldnt be able to happen, like obitos-kamui-ghost,

and this is what tvtroupe says abotu asspulls: An Ass Pull is a moment when the writers pull something out of thin air in a less-than-graceful narrative development, violating the Law of Conservation of Detail by dropping a plot-critical detail in the middle, or near the end of their narrative without Foreshadowing or dropping a Chekhov's Gun earlier on.

it fits with the tenseigan and the other ones (albeit on a smaller extend) :)