How-To film · 30
Time is a coordinate
Change revenue, then look back at an earlier revision without disturbing the live model.
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- A live model should remember its past.
- Dates are coordinates, not labels.
- Change the revenue in the present.
- Now ask what this cell knew before.
- The present stays live. History answers separately.
- Look back without rolling back.
Make the same move
Go from watching to building.
The film shows one cause-and-effect path. These guides, models, and references let you inspect the whole thing.