Modern university professor, middle-aged man, bespectacled, short brown hair, beard, standing in front of a whiteboard, wearing a navy blue suit, white shirt, tie, holding a marker, pointing to a complex cognitive architecture diagram, 20th anniversary celebration, balloons and flowers decorating the room, natural light pouring in through large windows, wooden tables and chairs arranged in a U-shape, students seated and engaged, laptops open, taking notes, softbox lighting, shallow depth of field, warm color tone, educational setting, afternoon atmosphere.