ABSTRACT
Serena, Zoe and Arthur were first into the bar. It wasn’t altogether to do with eagerness for the meeting, they agreed among themselves, more to accelerate the process so that they could squeeze in some Christmas shopping. Reluctantly they confessed to one another that they had actually enjoyed their previous session with the professor. Arthur was now the proud owner of a document that had been distributed at his workshop. He placed it ceremoniously on the table and the three scanned its contents (see Figure 7.1). Serena was pleased that she had mastered the art of upside-down reading.
