A quick snapshot taken at the Hospitality Suite of the library conference last week. You were invited to select a button of your choice. Which do you think I picked?
I sort of like the "I'm a librarian. Assume I know everything"! And "Dewey or Don't We?" is very clever. This is a total stab in the dark, but since you mentioned that abandoning the Dewey Decimal system was a hot topic at the conference, I'm going to say that's the button you chose.
