N.T. scholar Craig Evans, in a video making the rounds on some blogs, asserts that John’s Gospel is a summation of Jesus’s Synoptic Gospels sayings put into a paraphrase-like text. While I agree with him about the need for modern readers to be open to questions of genre and be sensitive against bringing preconceived expectations while studying the text, to try to fit G-John into the Synoptic Gospels is not warranted. For one thing, John’s Gospel has too many time stamps which belie Evan’s hypothesis.
Also, I wish to counter this position by noting John’s Gospel in 20.30 speaks of many other signs given specifically to His disciples which were not recorded. Also, in 21.25, John asserts that Jesus performed so many miracles (things), that the world could not contain all the books recording those events. This last statement is undoubtedly hyperbole but shows that John and the other Gospel writers were not attempting to produce comprehensive historical documents.
Lydia McGrew also counters: http://whatswrongwiththeworld.net/2018/09/the_messianic_secret_argument.html