The noncanoncial works contain traditions about Jesus that are all younger than those in the Synoptic Gospels.That is why they are not a part of the canon.

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Some noncanonical works, such as certain apocryphal gospels, may contain traditions or stories about Jesus that are contemporaneous with or even possibly older than those found in the Synoptic Gospels. The reasons these works are not part of the canon typically relate more to their theological content, authorship, and acceptance by the early Christian community rather than solely their age.

The Noncanoncial Works Contain Traditions About Jesus That Are All