And why do we, who say we oppose tyranny and demand freedom of speech, allow people to go to prison and be vilified, and magazines to be closed down on the spot, for suggesting another version of history.
For me, you've got to play football first. We're not trying to be accountants. The money takes care of itself. That's kind of how I think anyway.
A lot of the ideas or even individual technologies behind Khan Academy are not novel.