Three rules:

• Knowledge can only be volunteered, it cannot be conscripted
• We only know what we know when we need to know it
• We always know more than we can tell, we will always tell more than we will write down

And one principle:

If you ask someone for something they know in the context of a real need they will nearly always share it. If you ask them to share in anticipation of that need it will be refused.

Dave Snowden – from his slide in the previous post.