YSK that the average reading age in the US is that is that of a 13 year old, so when writing something for mass communication you should keep your language clear, simple, and unambiguous
from /r/YouShouldKnow
YSK認爲，美國的平均閱讀年齡是13歲，所以當爲大衆傳播寫東西時，你應該保持你的語言清晰、簡單和明確。