diff --git a/doc/preferred_content/standard_groups/comment_1_026e47e425d06c4b2580238b3187a379._comment b/doc/preferred_content/standard_groups/comment_1_026e47e425d06c4b2580238b3187a379._comment
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+[[!comment format=mdwn
+ username="http://mildred.fr/"
+ ip="2a01:e35:2f7b:8350:290:f5ff:feea:5546"
+ subject="difference between source and unwanted"
+ date="2014-04-02T22:25:26Z"
+ content="""
+What's the difference between `source` and `unwanted` ?
+
+- `source` (`not copies=1`) will keep files that have less than 1 copies, meaning zero copies, meaning no files.
+- `unwanted` will exclude all files.
+
+Both gets to the same results, all files are moved elsewhere. Right?
+"""]]
diff --git a/doc/preferred_content/standard_groups/comment_2_460bae34ba7c05357318a202b2932d25._comment b/doc/preferred_content/standard_groups/comment_2_460bae34ba7c05357318a202b2932d25._comment
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+++ b/doc/preferred_content/standard_groups/comment_2_460bae34ba7c05357318a202b2932d25._comment
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+[[!comment format=mdwn
+ username="http://joeyh.name/"
+ ip="209.250.56.244"
+ subject="comment 2"
+ date="2014-04-02T22:44:14Z"
+ content="""
+@Mildred, I think both preferred content expressions will do the same thing. There is, however a difference between the groups: The webapp notices when all files have gone from an unwanted repository, and will help the user finish deleting the repository.
+"""]]