Originally Posted by

**jdhooghe** I asked Siri on what the integral of x^2 was and she gave:

So she uses Wolfram Alpha. What does BlackBerry assistant and Cortana say the integral is?

You made a common mistake. You checked one search and used that to qualify all searches. Ask Siri "Where should I eat?" She'll return a list of restaurants with Yelp tagged.

Siri uses multiple search engines. When I ask the Thanksgiving question, she replies "It's 522 hours until then." None of these options show the Wolfram Alpha logo on this question. It's safer to assume the data is being pulled from somewhere else.