When using `dd` I always verbally say "`if` is input file, because I want to take data from <whatever I wrote there> and `of` is output file, because I want tha

When using `dd` I always verbally say "`if` is input file, because I want to take data from <whatever I wrote there> and `of` is output file, because I want that data to overwrite <whatever I wrote here>". Never have I ever had a `dd` incident, but that's such a fear I have that I developed this habit.