Board Thread:Boruto Discussions/@comment-10336-20170908030945/@comment-734582-20170908071743

SuperBen 1000000 wrote: Mostly because why this happened in the DNA test. It is really confusing as the blood is mostly Sakura's/Sarada's. All Karin did was touch it and somehow it read Karin's DNA as a match. It didn't. Karin's DNA wasn't tested at all. They found a cord which they assumed to be Karin's, and tested it against Sarada. Which matched 100% since it was Sarada's. If it were a good test, it should show a 50% match (since you get half your DNA from either parent). The 100% match was a dead giveaway that something was wrong, even though we couldn't trust Kishimoto's knowledge on Biology to depict this correctly.

In short, Suigetsu had no idea what he was doing and knew only how to press the right buttons.