I did not just explain to an ADULT the concept of decimals as they pertain to the measurement of parts per million. I can’t possibly have done that because any adult should understand what 0.25 and 0.5 mean in relation to 1 ppm. If he doesn’t get this, I’m going to have to explain the decimal system to him. I can–I’ve explained it to grade school kids and they understood–but if I must….yeesh.

EDIT: Well, thank Christ. I’m not convinced he understands decimals, but he did get the part where I told him to just bring it to 4.0, so I’m not going to push the issue. 😆