Actually, I think I am less knowledgable than before.

实际上，我认为我现在比以前了解的更少了。

How about the news? With news are you more knowledgable these days than before, say five ten years ago?

新闻呢？就新闻来说，你现在比以前了解的新闻范围更广、更全面吗，比如和5年前相比？

But if you see your errors as errors, you become less likely to repeat them, and by doing so, you become more knowledgable over time.

但是如果你把自己的错误视为错误，你就不容易重复这些错误，这样一来，久而久之，你就会变得更有见识。