If you've used Siri in the past, you know how reliable, or how unreliable it can be. For someone like me who speaks with a strong French accent, Siri gets it wrong more often than not, which led me to use Siri for very basic tasks instead of trying to push her limits.
If there is one time where Siri should be right on spot though, it's during commercials or ads. But there again, it seems like Siri, or rather Apple marketing department, isn't on top of its game.
In a recent ad placed on the back cover of the Economist, Siri was asked "what does poison oak look like" and she managed to return the wrong results...