Situation: I am sitting on an office chair at the table and facing the table with the blackboard behind me.
Alternative situations: After reading the instructions on the blackboard behind me , I sit on this chair to write down in a book my ideas. I am sitting on head of table, bottom side with both my forearms resting on the table in front of me as I wait patiently for the meeting to start.
Question: Is the amount of door I am facing odd or even?