Mathematically Annoying Advertising:
[[A ∪ B = {x:x ≤ 15 or x > 15 } = ℝ ]]
[[line graph representing the above equation]]
When discussing real numbers, it is impossible to get more vague than "up to 15% or more".
[["FREE*" in large text, with substantial illegible fine print]]
If someone has paid $x to have the word "free" typeset for you and N other people to read, their expected value for the money that will move from you to them is at least $(x
(N+1))
[[graph representing inverse relationship between "amount you spend" on the y axis and "amount you save" on the x axis]]
It would be difficult for the phrase "the more you spend the more you save" to be more wrong.
{{Title text: I remember the exact moment in my childhood when I realized, while reading a flyer, that nobody would ever spend money solely to tell me they wanted to give me something for nothing. It's a much more vivid memory than the (related) parental Santa talk.}}

Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors).

We did not invent the algorithm. The algorithm consistently finds Jesus. The algorithm killed Jeeves. The algorithm is banned in China. The algorithm is from Jersey. The algorithm constantly finds Jesus. This is not the algorithm. This is close.