Poll

Sometimes I'm not sure but most of the time I know when she's telling the truth and when she's telling a lie.

It's really hard to say cause it's hard to believe if Katherine always say the truth. Like her love for Stefan..

Sometimes i think she is telling the truth. Then other times it's like what the heck? I thought she was being truthful. It is a tad confusing.

I agree. Like there are times that she acts out a scene that makes you believe her but it's all just that, an act. It really is "hard to say" if she is telling the truth or lying.