There are three that seem to be out of place on http://stackoverflow.com/search:
noanswers:1 closed:1 wiki:1
I suggest it would make more sense to not require the 1 (since it doesn't seem to have any semantic meaning) and reword the grammar so it was either
noanswers: closed: wiki:
answers:no status:closed type:wiki
answers:yes closed:yes type:wiki
(Even as synonyms would be great. I am not a computer. yes or true is nicer than 1).