That is the one thing I think about when people say "I used it to learn X and it was very good" but when people are learning they are not in a position to to ju

That is the one thing I think about when people say "I used it to learn X and it was very good" but when people are learning they are not in a position to to judge if what they learned is correct. A lot of other stuff is just regurgitation of a wiki article. Still it is very interesting and definitely a step forward.