I don't know what it means; that's the whole point. I want a specific definition. I'll start with a question: Is a pregnant woman of 'able body'? Is a person who speaks english as a second language 'of sound mind'? Is a person who grew up in a place with very poor schools and who had to drop in high school to take care of their aged mother 'of sound mind and body'? Expound on the reasons please.