diff --git a/system theoretic process analysis.md b/system theoretic process analysis.md
index 706194ff4..f3f72f281 100644
--- a/system theoretic process analysis.md	
+++ b/system theoretic process analysis.md	
@@ -23,4 +23,5 @@
 			- a good control structure will enforce the system level constraints.
 		- control goes down, feedback goes up
 			- vertical axis represents a hierarchy ([[heterarchy]]? perhaps in voting systems)
-		- [[responsibilities]] can be assigned to each control structure entity; they are refinements of [[system level constraints]]
\ No newline at end of file
+		- [[responsibilities]] can be assigned to each control structure entity; they are refinements of [[system level constraints]]
+		- [[feedback]] can be derived from [[]]
\ No newline at end of file