Little bots file papers, pin them to boards and string them together. Each board is a slice of a private collection, shown by its shape only: index cards are claims, papers are evidence, green string supports, red rebuts, amber qualifies, and a red zigzag marks a contradiction. A yellow card with no string is a hypothesis. The bots are six kinds of agent; the buttons below the office describe each one. Every mark is a squiggle; no text, names or records are shown.