concepts and flows experiment

doc/concepts_and_flows/README.md

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+# Concepts and flows
+
+Writing software usually starts with creating a simple program
+to handle an use case. At this point, the solution practically
+mirrors the problem. One way of distinguishing this state is 
+that if I give you the problem you would arrive to a similar
+solution without seeing mine.
+
+However, if we want our solution to become more general, by
+handling many use cases, the code we write cannot grow at
+the same rate as our use cases. As a consequence we create
+structures that can accommodate such diverse situations.
+
+This solves the problem of generalization, but creates another:
+Now a newcomer who has never seen the evolution from particular to
+general use cases has a hard time seeing the justification for
+the structures we have.
+
+In this directory, you will find F# scripts that try to reproduce
+those initial use cases, and at the same time they are linked
+to current structures in the project.