Board Thread:Theories and Speculation/@comment-45444155-20200506094659/@comment-45444155-20200521142337

Actionmanrandell wrote: predisposition is defined as a liability or tendency to suffer from a particular condition, hold a particular attitude, or act in a particular way. so in this regard no shinobi is predisposed to any particular chakra nature as its not something you suffer from. they have a natural affinity to one element affinity a spontaneous or natural liking or sympathy for someone or something.

naruto has an affinity for wind nature, which means his chakra can easily replicate the properties of wind, mind you this is just a replication its not the actual element of wind, just like all other elemental jutsu are not really fire, lightning earth or water. thats why ninjutsu can be absorbed by the Rinnegan but if a shinobi picked up a rock and chucked it at Madara he couldn't absorb it

and while the Uchia prefer using fire nature and its their clans natural affinity, Sasuke himself had an affinity for lightning release

The affinity to an element is determined by means of a special test with a sheet of special paper, which changes when the chakra passes through it.

The question is, if it is only a matter of simplicity of study, how does special paper transform the chakra into an element?