necessary · obligation
required for a change to happen
Examples
- The International Space Station requires regular reboosts to counteract atmospheric drag and maintain orbit. engineering
- Cyanobacteria had to evolve oxygenic photosynthesis for Earth's atmosphere to shift from anoxic to oxic 2.4 billion years ago. biology
- Bitcoin mining consumes more electricity than Argentina annually to secure transaction validation on the blockchain. computing
Emergence
through: required and change together create a condition that the change cannot occur without it
- dependency for change
- temporal necessity
- unavoidable condition
Chain to foundations
as tree
- necessaryL7
- requiredL6
- changeL1 (shown above)
- happenL2
Neighborhood
Concepts that depend on this one above; what it is built from below.
Relations
| is-a | required.obligation | is-a |