A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. Well, you know what the average person would you ever have thought of that? But quite a few things were impossible to that engineer's obscure and unimportant nephew, the computer technician and generally undistinguished man who had been christened Dave. Does it follow that the engineer was the one who christened Dave? A person is in a meeting and is discussing a project.
yes
no
no
yes