Relationship(s) between problem and solution space

One of the more confusing concepts in Domain-Driven Desing is that of problem and solution space. There has been a long debate on Twitter and the ddd-crew github: https://github.com/ddd-crew/strategic-architecture-building-blocks/pulls?q=is%3Apr+is%3Aclosed People...

What makes you a DDD’er?

From twitter: https://twitter.com/mathiasverraes/status/1298665213978447873?s=20 Using collaborative modelling to build a shared understanding of your domain and use it to guide your design _is_ the philosophy behind DDD though. The rest is the principles, patterns,...