My son finds it hilarious that Speck ads cause me to rant about math illiteracy. These ads drive me nuts. They utterly misuse Venn diagrams. For example, consider the following:
The set of New Yorkers who own cars does *not* intersect with the set of New Yorkers who do not own cars. The two circles should not be overlapping in the graphic.
While the set of New Yorkers who had a car until the value of their parking tickets exceeded the value of the car *does* intersect with the set of New Yorkers who do not own a car, it does *not* intersect with the set of New Yorkers who currently own a car.
This is hardly rocket science. It is elementary school math. What does this say about the state of our educational system, and what effect does such an ignorant and ill-considered misuse of mathematical principles being put on public display have upon our current crop of students, who must look at these things and feel hopelessly confused?
Reason number 8,749 to homeschool...