When you read the four Gospels: Mark, Matthew, Luke and John, you notice that some have material missing from others and some treat the same material differently. If you presume that the gospels were just magically given to the writers, then you have a problem understanding why God would change the record. If you presume they relied solely on their memory, then you have difficulty explaining why it should be treated as divinely inspired. Theologians have invented an imaginary document called Q in order to solve their problem <ref>https://en.wikipedia.org/wiki/Q_source</ref>. But it actually makes it worse since if it did exist and has been lost, then God could not protect every jot and tittle. How should they be approached?