system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is it that illiteracy still exists in the United States?

Given that school is required for kids how is it that not everyone has become literate by now in the United States?
gpt
Illiteracy still exists because: Some kids actively refuse to learn to read, and they manage to fake it well enough that they fall through the cracks of the schooling system. Others are severely dyslexic and so are really only partially illiterate, or they have severe mental handicaps preventing them learning to read. 

But statistically these people make such a small percentage of the population that we do have a fully literate society for all practical purposes.