"In preparation for my sermon next week, I want you all to read Mark chapter 17. You are dismissed".
So next week everybody comes back to church. After singing a few hymns, the pastor comes to the pulpit.
"How many read Mark chapter 17 like I said last week?"
Everyone raised their hand. The pastor says "and it's a great chapter, amen??"
There are shouts of "amen!" from the congregation.
Then the pastor smirks. "Well, Mark only has 16 chapters. I will now begin my sermon
Spoiler:

