You can also have the case where the human reading the document thinks something in there is instructions and they are not. There's a well known anecdote suppo

You can also have the case where the human reading the document thinks something in there is instructions and they are not. There's a well known anecdote supposedly from the famous mathematician John Littlewood where he wrote a paper about some optimization problem and the last sentence was something like "Make X as small as possible". The typesetter thought that was instructions to him, and so omitted that sentence from the paper and made every X as small as he could.