Dan asked:

Does anybody else's copy of the book have some printing errors in some of the math? For example, in the equation at the bottom of page 154, there is a rectangle instead of a delta (this is a common error in printing math symbols). And on page 176, there are stacked rectangles instead of tall absolute value signs.

Johnny Stinebaugh I have delta symbols on pg 154, and no absolute values (only equal signs) on page 176. Hopefully this helps?
Image for What If? Serious Scientific Answers to Absurd Hypothetical Questions
by Randall Munroe (Goodreads Author)
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