Harold, thanks for this stimulating post. Any organization that takes learning and performance seriously absolutely needs to make tacit knowledge more explicit. What you’ve suggested is absolutely right at an individual level but there’s also a cultural issue here. Organizations, in my experience, that are good at sharing tacit knowledge are low blame cultures have a good esprit de corps and a sense of mutual support. As learning and development professionals it may be beyond us to create that culture in an organization but we should aim to live it in our own departments.