I don't think you can simply assert that. People sometimes do try to avoid naming something twice, especially if it has an unwieldy name. For example, to cube

I don't think you can simply assert that. People sometimes do try to avoid naming something twice, especially if it has an unwieldy name. For example, to cube a quantity, I don't like to write "xxx". Imagine if x had another name, like "player_position.x". Sometimes people try to avoid naming something even once! Such as in an anonymous function.