What is the differecne between a weaseler and a downplayer.

Question

Since this is not my area of expertise, I searched Google under the key words "weaseler downplayer" to get these possible sources:

http://military.coastline.edu/classes/philosophy115/lessons/chapter4lesson8-9.htm
http://faculty.deanza.edu/hansontony/classes/course1
http://highered.mcgraw-hill.com/sites/0072818816/student_view0/chapter4/frequently_asked_questions.html
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Search for the individual key words within each site.

I hope this helps. Thanks for asking.