> you invent these concepts independently That sounds confusion to me. Those patterns are called patterns, because people practice them over long time, during

> you invent these concepts independently That sounds confusion to me. Those patterns are called patterns, because people practice them over long time, during the cause, they decoupled them nicely. Assigning the right name, implicitly means the clear understanding of scope and responsibility. Self-invented solution may echo the original idea in some aspects, but most of time, is not even nearly as clean.