Something is wrong with the layout that makes it awkward for me to read. The word spacing, at least, seems awful. Look at the lines "meaning behind printed words ..." (near top) and "widely believed that ..." (near bottom) compared to the lines above and below them.

Maybe it's the full justification adjustment - the text in the box is much better. Even the dictionary popover has word spacing problems.

That's a big deal for reading long-form.