The Alogi were a group of heretics to the Christian church in the second century. They flourished around 170. What we know of them is derived largely from their opponents, who suppressed them by doctrine. They attributed both the Gospel of John and the Revelation of John to the Gnostic Cerinthus. They denied the divinity of the Holy Spirit and denied the doctrine of the incarnate Logos (the word made flesh in Jesus). They were called "Alogi" as a dual pun, to suggest that they were illogical (anti-logikos) and anti-logos.