Skeptics love to tell Christians that the Gospel stories developed over time, adding more mythological elements as they went along. Matthew and Luke copied Mark plus added more fables. And then you get John’s Gospel, which is total theological fan-fiction according to the critics. But if that’s true, why do the Gospels have interlocking details that seem to be unlikely if they were just copied from each other or some other common source? The Gospels frequently add passing details that answer a question raised by the other in a way that fits together like a jigsaw puzzle. Fictions and forgeries don’t work that way. Some scholars call these undesigned coincidences. So what the heck is an undesigned coincidence anyway? And do they serve as evidence for Jesus' passion and resurrection?
https://youtu.be/bfcCfmQqc