What a knowledge investor is
An angel investor writes a cheque before anyone else will, and stays through the years when a company is mostly risk. The cheque matters. But founders who have had a good angel will tell you the money was rarely the part that changed the company. The part that changed it was the person: the question asked at the right moment, the framework that turned a guess into a plan, the mistake named before it was made.
A knowledge investor makes that part the investment. The investment is knowledge, not capital — a body of tested method committed to a company early, at the same risk, for the same long run.
Knowledge behaves like capital in the one way that matters: it compounds. Cash is spent once. Knowledge invested in a team is used every day, taught on to the next hire, and is still working long after the investor has left the room.