Great post by Lydia McGrew. BTW, while the feeding of the 5,000 from 5 loaves and two fish and taking up 12 baskets full of broken pieces is in all four gospels, the feeding of the 4,000 from 7 loaves and a few fishes taking up 7 baskets full of broken pieces is only in Matthew and Mark. If only Matthew had recorded the feeding 4,000 and Luke only the feeding of the 5,000, critics of the Bible would surely have thought the two accounts were relating the same event with contradictory numbers. Even more so if Mark recorded 4,000 and John recording 5,000. That would surely have been considered a case of John pietistically embellishing the story because his was the last gospel written, similar to how John's gospel has a much higher Christology than Mark's. [Actually, I think Mark's Christology is very high. Also, IMHO it's Luke's Christology that's the lowest among the gospels (excluding Acts, which is Luke's part II).]
Good point, AP.