You might want to consider "[mistruth](http://www.urbandictionary.com/define.php?term=mistruth)."

http://chuckcowdery.blogspot.fr/2012/01/mistruth-in-alcoholic-beverage.html

E.g.

> [An opinion can most certainly be a mistruth when presented as a fact.](http://fatsecret.com/Community.aspx?pa=fmse&keywords=Diabetes+Nutrition+Pack)

> [The next question will be: "Have you ever used any mistruths, bent the truth a bit, planted a false suggestion in order to make a confession?"](http://www.fmotl.com/forum/viewtopic.php?f=17&t=6785)