Covariance refers to a relationship where a system designed for a broad category can safely accept elements of more specific types within that category.
Metaphors:
- Toy Chest: A container labeled "Toys" can hold all toys, whether cars or dolls.
- Ticket Counter: A counter for "Event Tickets" accommodates specific events, like concerts or sports games.
- Nest of Bowls: A set of "Mixing Bowls" accepts any specific-purpose bowls within it.
Philosophical View:
- Covariance represents unity in diversity, illustrating how specific elements integrate into a universal framework.
- It's akin to individual waves that form part of the ocean—each wave is unique yet fundamentally water, showing specificity within a broader context.
Principle:
- Related to the Liskov Substitution Principle, which allows specific instances to substitute general ones without affecting correctness.
Covariance embodies substitution, interconnectedness, and harmonious integration, promoting flexibility and correctness within systems.
Cognition = establishing new coherent schema through co-variant motion-relations. Bonnitta Roy (@bonnittaroy): "Cognition = establishing new coherent schema through co-variant motion-relations. Doesn’t get any more concrete than that! https://youtube.com/shorts/QDeOk9k14E8?si=bDkWzmR2zPVgOuo7"