Good drawings. Yes as I said we are just saying the same thing
differently. To me the second picture is not just upside down it
is flopped. It is upside down and backwards. The 3rd image is
merely upside down. If you actually take a piece of paper and
make that drawing in picture #1 and then spin it round till it
is upside down you get picture #3. If you spin it round upside
down and turn it over you get picture #2. That is if you can see
through the paper.