How do you know when somebody is lying?

Just watching an Obama talking head about Ayers and Obama's "friends". She says that Raines as never a part of the Obama campaign (and yet there is a line directly to him). Meanwhile, her eyes are blinking like she has a bucket of salt thrown into her eyes. Fast blinking eyes (according to those who study body language) means you are lying and you know you are lying.

Can the Obamabots ever . . . ever . . . tell the truth?

That's a little harsh, I mean they do tell the truth SOMETIMES. For example each time during the Presidential Debate Obama said, "My opponent is absolutely correct." 100% honest. And then there was...

Hmmmm... Ok, that's all I can think of off of the top of my head. There must be something though... right?