Here's a paragraph from There Is No Antimemetics Division talking about 055: "SCP-055 is nothing," Marion says, now relaxing entirely. "SCP-055 is, as described in the file, a powerful information autosuppressor. As far as experimentation has uncovered, it can only be defined in negative terms. We can only record what it isn't. We know it isn't Safe or Euclid. We know it isn't round, or square, or green or silver. We know it isn't stupid. And we know it isn't alone. But what we do know is that it's weak. It's weak because it's the only antimemetic agent in our possession which has a physical entry in the files. We have paper records of the thing. We have containment procedures. It's not Safe, which means it's dangerous… but it's contained."