This correction notice is to highlight that the following line was mistakenly published under the ‘Acknowledgements’ section: “I am thankful for Dr. Jim Gillespie’s example that was used as the basis of this one.”
This line should have been published as a footnote to the following line on page 12: “Suppose there is an evil person living in my neighborhood who secretly has cameras everywhere to monitor everyone.”
The publisher apologises for this error.