How do you know? vs Where do you know from?

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Looking on the internet deeply has found these results:

How do you know? is the most popular phrase on the web. 

Where do you know from?

13,150 results on the web

How do you know?

1112,000,000 results on the web

More popular!

Some examples and use cases from the internet:

Some examples and use cases from the internet:

  • Nov 4, 2015 ... [–]thestevo95 0 points1 point2 points 5 months ago (2 children). where do you know from that he was a guard? sorry for bad englando.
  • ?? ?????? ?? ????? ? ????. He doesn't know anything about you. ?????? ?? ??????? How do you know? (lit: Where do you know from?) ? ???? ?? ?? ????? .
  • Oct 17, 2001 ... Exercise 3: where do you know from? What are the main sources of new knowledge for you at work? Pg. 12. © Dorothy Russel, Oct. 2001. 4.
  • Where do you know from that sample C is the htc 10? As far as I can see right now this is a blind comparison. No one except the authors know ...
  • How do you know?
  • I said, "How do you know?"
  • Yes. How do you know?
  • (Derek) How do you know?
  • "He's not in Napa, he's at the ice factory," he'll say, "How do you know?"
  • and he said, "How do you know?" I said, "I heard it!"
  • But never to exist again?
  • Then I'd say, "How do you know?"

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