The answer is “NO.”
Always.
In the last few months Jane had been shaking her head “no” when she was really excited and meant “yes.”
Cute but confusing.
Now this quirky little trait has grown up along with her and transformed into verbal communication. Which is a great developmental milestone – not so charming.
But, she is learning and with a bit of prompting, we can now get a giant emphatic head nod along with the “no” when she really means “yes.” Of course this means that you have to either be able to know when she actually means “yes” or do a convincing enough song and dance about the whole thing that you change her mind.
It’s all very confusing to the uninitiated and not much better for the rest of us.
Good thing she’s got enough natural charm to make up for it! 
Have I mentioned how she takes after her dad?
She certainly does! But she’s my favorite since she said “no” about my jelly sandwich and then ate it emphatically without complaining. 🙂 Love her.