Alan Cox, the chief executive of Core, Ireland’s biggest marketing communications group, is at his desk when I ring. A week ago we had arranged to meet for coffee in his stunning offices, on the site of the old Windmill Lane Studios in the heart of what has become Dublin’s silicon docks.  The plan had been to discuss Core’s ‘Outlook 20’ report, which, over a beautifully presented 42-pages, predicted the future of the marketing industry in Ireland for this year.  I had listened to the podcast version of the report last week and prepared an array of questions about a…