Board Thread:Theories and Speculation/@comment-34656247-20190723175508/@comment-26636534-20190919125745

Kuzan Uchiha wrote: @Ninja....are you saying the sharingan can track anyone then? and just that the user won't be able to keep up depending if they're slower than the person they're tracking? Like I said above, the sharingan's main power is prediction. The relative power of that prediction depends on the user and the variants (MS, EMS etc). The problem with predictions are: 1) The prediction can be wrong or 2) prediction is impossible. Even if the prediction is correct, the user still may not be able to dodge the incoming attack. Or have an ability that is able to counter the enemy.

So, using the example of Sasuke vs Itachi. Itachi and Sasuke were throwing shuriken at each other, Sasuke didn't see Itachi weave signs for the crow clone. Sasuke only saw the clone at the last second and had to counter with an ability that needed no hand signs. So prediction was impossible due to Sasuke's lack of MS, speed of Itachi and tracking and prediction all the shuriken, probably.

I would sorta compare the predictive ability to Julius Novacrono's ability in Black clover to predict the future, to an extent.