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

https://norrie.wordpress.com/2009/01/16/

http://www.becomingminimalist.com/superbowl-ads-mistruth/

E.g.

> [If it's not a lie, but a mistruth, is it slightly less false?](http://jezebel.com/5780890/scott-browns-step-father-challenges-abuse-claims)

> [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)