Contradiction (矛盾, Mujun) is chapter 555 of the Naruto manga.
Naruto's attempt at forming a Tailed Beast Ball fails, and is forced out of Nine-Tails Chakra Mode. Naruto tells Dodai that he needs to contact B and the Eight-Tails. As the Raikage suddenly attacks them, Dodai forms a rubber ball as a decoy to buy Naruto some time. Dodai contacts Inoichi Yamanaka, who allows Naruto to talk to B. Naruto tells B that he wants to talk to the Eight Tails. The Eight-Tails tells Naruto that when it and the Raikage fought they collapsed with both of their techniques in hand. The Raikage cuts the rubber ball in half and sees that Naruto isn't in it. He heads towards Naruto's location. Naruto goes in to Sage Mode and plans to use Frog Kata to sense the Raikage's attack faster. The Raikage attacks with a one-finger nukite, but Naruto dodges and hits the Raikage's arm with a Rasengan, knocking his attack into his own chest. The sealing team immediately seals the Raikage. Elsewhere, the Second Mizukage stands before an exhausted Gaara and asks him if that was all he is capable of.
This title is written with the kanji for "spear" and "shield", setting the theme for the chapter.