No, of course we'll try and go definitive, but quite a lot of stuff like this you can't go definitive because it's lost in the mists of time or there are competing theories, but I'll put it on the board.
But you know, when you're feeling a little under the weather, because you've been up late at night, there's really only one name you want to see on the board about who you're talking to that night.
As the light from one slit propagates, it cancels out the other wave of light at certain points, creating the interference pattern that Young noticed on the board.