Maybe you should read it again:
No. I read it just fine thanks.
They are referring to the FDA tests I would imagine.
The ones that showed that there were less carcinogens in E-cigs than there are in nicotine gum, and patches.
Amounts so small they cannot be accurately measured.
So to say they contain carcinogens is technically correct, but not to quantify what that means disingenuous to say the least.