You may be a reference librarian if...

...if you've ever had a 5 minute debate with someone over the absence of a table from the reading area.

A patron was curious to know what had happened to a particular table that had been in the big open area between the fake tree and the round table. I had to explain several times that there had never been a table there. Ever.

"Well, did it break?"

"There was no table there."

"Did someone damage it? Is it being repaired?"
"There hasn't been a table there. All of the tables are in this room."

"But this big open space! This space was never here before!"
"Maybe some of the other tables have shifted over the years?"

"I know there was a table here before!"

Okay, fine, there should be a table there. I've just hidden it with my special superpowers of making physical objects invisible. Careful you don't walk into it!

You may be a reference librarian if...

...if you've ever been shushed by a library patron while helping another patron.

And then had to turn around and shush the first patron an hour later for singing in the lobby.