Another interview today in Grand Fenwick. This time, I learned about dust.
Applicant: There are three grades of dust. The first grade, coarse, is 50 microns and bigger. The second grade is fine, which is one to 49 microns. And the last grade is super fine, which is invisible to the human eye.
Me: Except to mothers in law.
Applicant: Yes! They can always see it!
Me: Because they are looking for it.