Looking on the internet deeply has found these results:

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

How did you know that? 179,700 results on the web	How do you know that? 193,300,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Dec 11, 2014 ... What is the best response to "how did you know that?" (self. ..... "Wow, how did you know that kissing in the lower lips felt that good? My ex bf of�... Mar 26, 2014 ... I hear people say something like this: How did you come to know that I bought apples? Compare with: How did you know that I bought apples? How did you know that I, I wouldn't last a minute, That I would be so lost without you, That this life, Wouldn't mean a thing without you in it, And I'd come running�... However it can also be used to show the hero's courage, as in: "How did you know that bomb wasn't real?" "I didn't." (It's also used as a punchline, where the�...	Okay. How do you know that? How do you know that? Wait, how do you know that? I read about it, in a book. Hitler then asks, "How do you know that?" How do you know that?

How did you know that?

179,700 results on the web

How do you know that?

193,300,000 results on the web

More popular!

Dec 11, 2014 ... What is the best response to "how did you know that?" (self. ..... "Wow, how did you know that kissing in the lower lips felt that good? My ex bf of�...
Mar 26, 2014 ... I hear people say something like this: How did you come to know that I bought apples? Compare with: How did you know that I bought apples?
How did you know that I, I wouldn't last a minute, That I would be so lost without you, That this life, Wouldn't mean a thing without you in it, And I'd come running�...
However it can also be used to show the hero's courage, as in: "How did you know that bomb wasn't real?" "I didn't." (It's also used as a punchline, where the�...