Don't think that the easier it is to learn, the easier it is, the more ineffective it is; if you want to make learning effective, then it should be difficult and self-challenging; just think about it,

Don't think that the easier the learning, the better, the easier it is, the more ineffective it is; if you want to make learning effective, then it should be difficult and self-challenging;

Imagine, would you rather have an article with a normal typography and clear font, or would you rather read an article with blurred handwriting?

You will definitely choose the former.

But the truth is that when the page text is slightly blurred, or the font is slightly illegible, people are better able to recall the content of the article. All this is called "consensual difficulty".