Three pieces, not a proof

Ren is about to watch a board sign as if a liner had been proved. What is actually open is smaller, and it is a combination, not a single machine.

A partner can bring one real piece, the piece the ordinary sheet cannot rank. A bench can book a run small enough to compare with that sheet. A plan can say what the signature waits to claim. Those three are the use cases this year unlocks. The local form — who, the comparison, the sentence — is still Ren's to invent. The pages do not fill it in.

A signature that skips all three is the instance. The pathway is the combination.