Undesigned coincidences and evidence of independence: Destroy this Temple

We've been talking about internal evidence of independence for a couple of weeks now. Now let's see how this works in a Gospel example of an undesigned coincidence. John's record of a thing Jesus said after cleansing the Temple explains Mark's record of what the hostile witnesses said about Jesus at his Sanhedrin trial. But get this: This saying of Jesus in John occurs in a passage that constitutes one of the most famous alleged contradictions between John and Mark--the early Temple cleansing.