Si

The french si, not the spanish one. The one you use to reply affirmatively to a negative question. A silly silly word, if you ask me, because it solves a problem that should have never existed in the first place.

Who on earth invented the idea of negative questions?

Negative questions do not add any meaning that normal questions don't have, it's actually pretty oxymoronic if you think about it, what does it mean for you to negate something you don't know (yet at least)?
Some languages, like formal Arabic and French, took it even further and made up words to denote an affirmative response to a negative question. After all, what does it really mean to reply 'Yes' to 'Are you not going to work today?'.

I hate very few things in life, and negative questions are so bad that they managed to make it very close to the top of a very short list.

The worst thing about negative questions, to me, is that they suggest some sort of expectancy of a negative answer on behalf of the asker. But why anyone feels compelled to communicate their anticipated answer to their question is beyond me, if you know the answer, just don't ask the question.

'Are you not going to eat?' sounds like "Are you going to eat? You really shouldn't" and 'Are you not coming?' sounds like 'why don't you spare us your company?' to me.

Just think of it, how many times have you had to reask a question in the proper (affirmative) form after not understanding the answer to your previous negative question?

Negative questions are evil.