Duncan McTavish has spent his career at the meeting point of people, information, and the machines that carry it — from a punch-card computer in 1975 to the AI assistants of today. Along the way, one conviction held: real advantage comes from how faithfully we keep what we know, connect it, and turn it into decisions that last. He set out to be a teacher, and though his path bent toward adult education rather than the classroom, the aim never changed — helping people strengthen the craft they already have. Irreplaceable is the latest way he's found to do that. LinkedIn