Board Thread:Questions and Answers/@comment-88.110.77.129-20141204223028/@comment-1173941-20141204224111

Yeah, I'm a little confused myself. Ducker's page has the following note:

In SAO, a thief is a player specialised in disabling traps, as well as finding loot. Thieves are not considered to be a class

Where is this information from? I feel that this note needs a reference.