What is Harriet Harman really denying?

Politicians really do take us for fools. In the latest speculation over a leadership bid to oust Brown she is quoted:

Harriet Harman said again that she was not planning a leadership bid. "When a woman says no, she means no," she said.

I quite believe where she says she isn't planning a leadership bid, but that's not what we want to know. Does she rule out standing if there is another challenger? The answer to that I suspect would also be no.

Surely they all realise that its weasel words like these that drive us in to holding politicians in such contempt?