"You tell parents to choose a toothpaste with a fluorine content of 1,000 ppm. They may not be able to choose. You might as well tell him which brands of toothpaste you can buy!"
This paragraph is actually a bit of
"If you tell your parents to choose 1000 ppm fluoride toothpaste, they may not be able to choose it. Why don't you just tell him which brands of toothpaste to buy! "
In fact, this passage is a little intimidating. I've