The article doesn't even mention the Knowledge Graph. It's using just referring to the fact that Google is still the first place you go to ask those questions. Usually, the answer resides somewhere in the first page of results.
I asked Google "will a poisonous snake die if it bites itself?" Results include Quora, Yahoo Answers, a Youtube video of a snake actually doing it, and HowStuffWorks. So no "Google" doesn't know, but I'm going to ask Google when I want to answer a question.
I asked Google "will a poisonous snake die if it bites itself?" Results include Quora, Yahoo Answers, a Youtube video of a snake actually doing it, and HowStuffWorks. So no "Google" doesn't know, but I'm going to ask Google when I want to answer a question.