Incremental correctness is the process of iterating towards something more truthful, accurate, usable, or interesting. The faster we can iterate, the faster we can discover good ideas. Things aren't perfect today, but tomorrow things can be slightly closer to perfect.

Incremental correctness changes everything about the way you work. It's anti-perfectionism. It's pro-generation. It's about discovery and proof, research and prototyping, and having a framework to reliably test your instincts. It discourages major redesigns, preferring isolated improvements to a small subset of nodes in any kind of working tree.

via Brian Lovin