Our systems mirror our thinking and collective communication. When architecting, we are synthesizing people's knowledge, experience and good judgement. We are unionizing people's creation process to build them. Achieving conceptual integrity in a system requires crafting conceptual integrity in people.

The art and science of collective reasoning predates technology by seven centuries. Our software and systems design work is strengthened by practicing strong sociotechnical methods for making logical and consistent decisions *based on valid reasons*. This talk will highlight those practices and discuss some modern-challenges to thinking well together.