How far can the past support the future?

Begin with a concrete case.

Choose the case that makes the question clearest to you. This choice only decides where you begin.

1. Case 1

   Change the record from 1 to 10 to 1,000 cases in which a light followed a lever pull in the same device.

2. Case 2

   Move a same-named component to a different workshop, material, and environment, then toggle a no-lever comparison and a hidden timer.

3. Case 3

   Before a cutoff time, the same observed green emeralds fit both “green” and “grue,” where grue means green before the cutoff and blue afterward.