Sometimes, because I’m weird, I consider what has to happen for a person to read. Think about it, squiggles on paper that we have decided as a group mean certain sounds. We have further decided that those sounds mean a particular thing when coded together. Rearrange that same group and you get a different meaning. In English that translates to 26 letters that make 30+ sounds to make thousands of words.
Thinking about it too much usually causes me to lose the ability to read for a little while. This is what happens when I have too much time on my hands and too much caffeine in my blood.