Me: What is xenforo?
Siri: ("What is Zen 40") I can't answer that. But I could search the web for it, if you like.
manually correct spelling...
Siri: ("What is Xenforo") Okay...how about a web search for xenforo?
Result #1:
http://xffaq.com/xenforo-faq.html
First question of the list ...
What is XenForo?
Me: How much wood could a woodchuck chuck if a woodchuck could chuck wood?
Siri: That depends on whether it is a African or European woodchuck.
Me: What is the meaning of life?
Siri: 42