diff --git a/submission_thesis/CH4_FMMD/copy.tex b/submission_thesis/CH4_FMMD/copy.tex
index 3688577..5b687e5 100644
--- a/submission_thesis/CH4_FMMD/copy.tex
+++ b/submission_thesis/CH4_FMMD/copy.tex
@@ -1227,7 +1227,7 @@ This issue addressed formally in section~\ref{sec:cc}.
 
 \paragraph{Uses of the FMMD failure mode model.}
 %
-Having a  failure mode graph/model, where base component failure modes are traceable to top event events,
+Having a  failure mode graph/model, where base component failure modes are traceable to top level/system events,
 provides  a forward search derived failure mode model. 
 %A forward search means that we can apply checks to ensure that
 %all known component failure