Far From Obvious

Shamelessly jumping on the bandwagon Douglas Bowman provides these instructions:

  1. Grab the nearest book.
  2. Open the book to page 23.
  3. Find the fifth sentence.
  4. Post the text of the sentence in your journal along with these instructions.

It may not surprise any of you that the result of my following these instructions was this sentence:

It arises, in fact, in responce to the “starting vortex” in §1.1, but why this should be so is far from obvious, and rests on one of the deepest theorems in the subject (§5.1).

The “it” refers to the circulation around an aerofoil, the book is Elementary Fluid Dynamics, and the section is about the only part of the book not relevant to my course. Now go find a book longer than 23 pages and report back here (or elsewhere).