From beware cranks (1st link):

  The mathematical physicist John Baez proposed a “crackpot index”[1] [snip]

  Mathematician Chris Caldwell was inspired by Baez’s list and devised a mathematical version. Some (lightly edited) examples from Caldwell’s list are

  1 point for each word in all capital letters;
  5 points for every statement that is clearly vacuous, logically inconsistent, or widely known to be false;
  10 points for each such statement that is adhered to despite careful correction;
  10 points for not knowing (or not using) standard mathematical notation;
  10 points for expressing fear that your ideas will be stolen;
  10 points for each new term you invent or use without properly defining it;
  10 points for stating that your ideas are of great financial, theoretical, or spiritual value;
  10 points for beginning the description of your work by saying how long you have been working on it;
  10 points for each favorable comparison of yourself to established experts;
  10 points for citing an impressive-sounding, but irrelevant, result;
  20 points for naming something after yourself;
  30 points for not knowing how or where to submit their major discovery for publication;
  30 points for confusing examples or heuristics with mathematical proof;
  40 points for claiming to have a “proof” of an important result but not knowing what established mathematicians have done on the problem.

[1] https://math.ucr.edu/home/baez/crackpot.html

Edit: The second link has a scanned advert at the end from 1983 for “The Science of Programming” by David Gries: the title of the book amuses me.