You can't really say they didn't know what they were doing. You based your question around knowing Siri can't answer it when worded properly in conversation. Key words are ignored (dog) other words are misinterpreted ("eat" so assuming restaurant) then potentially giving incorrect information...that is incorrect (a pizza place that doesn't serve sandwiches saying it does of course I don't know if it does or not just going off the OP).
Plus you were given a web search which isn't really an answer anyway. Albeit that is a strange question.
.......
On a side note I find Siri pretty good at times. I'm in a class and I know I have 19 weeks left. I asked Siri what the date would be in 19 weeks. The actual answer popped right up. I was happy with that. I also find her useful for math questions I don't feel like figuring out in my head, generally when driving.