They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

人们说，一知半解是件危险的事，但它还没有无知的一半糟糕。

-- Terry Pratchett 泰瑞·普莱契