diff --git a/4 Qualifying Exam/3 Notes/Robust Control.md b/4 Qualifying Exam/3 Notes/Robust Control.md
index 47967459..8f711f77 100644
--- a/4 Qualifying Exam/3 Notes/Robust Control.md	
+++ b/4 Qualifying Exam/3 Notes/Robust Control.md	
@@ -10,4 +10,6 @@ Robust control works with
 Not particularly a limit but something to look at: there are a ton of papers that use the word 'robust' but aren't actually doing textbook robust control as Doyle puts it. Instead, they're doing some kind of formal methods and calling it robust because...? Who knows. Here's some examples:
 [[farzanRobustControlSynthesis2020]]
 
-**Limitation**: Using automated design tools for robust control of SISO systems has its benefits outweighed by the labor involved in creating the weighting transfer functions [@atsumiModifiedBodePlots2012]. 
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+**Limitation**: Using automated design tools for robust control of SISO systems has its benefits outweighed by the labor involved in creating the weighting transfer functions [@atsumiModifiedBodePlots2012]. 
+
+**Limitation**: Disk unstructured uncertainty cannot lend itself to creating individual examples of perturbed plants. It is not as simple as picking a plant that is within the robust control disk, because the transfer function that actually gets you there is lost in the abstraction. Or perhaps generalized.
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