2 secs with Google would show you it’s a Commercial Driver’s License.

I’n never sure though that the initials a person is using is for the same thing that comes up as the first item on a Google search, so I like to ask the person instead.

But I’m sure you already knew that.

I wouldn’t have bothered asking if I did.

but again, you knew that.

Not sure how I pissed you off, but I really didn’t know.

For those that (actually) didn’t know, there ya go.

As someone who didn’t know, thank you.

You must be lots of fun at parties.