diff --git a/thesis/6-Discussion.tex b/thesis/6-Discussion.tex
index c01ec9b67a39f6642029277575a4ce3dd1b906ad..63969b783cd2db97cffe8fd3c78546e8268da146 100644
--- a/thesis/6-Discussion.tex
+++ b/thesis/6-Discussion.tex
@@ -104,6 +104,9 @@ Second, unfortunately, including an ethnographic analysis was not possible.
 This is partially due to the fact that we employ a computer science perspective on the question and partially due to limited time.
 Third, the manual filter classification was undertaken by one person only, so biases of this person have certainly shaped the labels.
 
+Fourth, edit filter history table was not available, no hollistic quantitative analysis of the filters' development over time
+Fifth, no access to the details of hidden filters, so no insights into the areas they target (although couple of educated guesses: bunch of persistent long term vandal, who often employ sockpuppets; harassment/personal attack cases hidden to protect the affected persons)
+
 %TODO describe also negative results!
 
 %Data