Everyone seems to render nappamajjati (e.g. in Dhp 259) as "not negligent", and commentary seems to support this, but I'm puzzled. If it was na pamajjati, or even appamajjati, OK. But nappamajjati is a double negative surely? I.e. na-appamajjati. Or should we read na(p)pamajjati? Is that possible? How should we parse this?