>[!abstract] >For want of a nail the shoe was lost; >For want of a shoe the horse was lost; >For want of a horse the rider was lost; >For want of a rider the message was lost; >For want of a message the battle was lost; >For want of a battle the kingdom was lost. >And all for the want of a horseshoe nail. > >(Wikipedia, 2025). >[!related] >- **North** (upstream): — >- **West** (similar): [[Nonlinear system]] >- **East** (different): — >- **South** (downstream): —