However, I think it's weak that the 'best example' is to 'hazard a guess' that Sal Khan learns more from teaching than just reading. There's no actual evidence in that statement, it's effectively just backing up 'I think' with 'I think.' I find it disappointing because I'm sure there are good arguments that could be made for his point.
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I wholeheartedly agree with this.
However, I think it's weak that the 'best example' is to 'hazard a guess' that Sal Khan learns more from teaching than just reading. There's no actual evidence in that statement, it's effectively just backing up 'I think' with 'I think.' I find it disappointing because I'm sure there are good arguments that could be made for his point.