Accessing the KB is really simple. As said, you can add knowledge, delete it, or make query for it.
#Inserts a Knowledge agent.addBelieve(expr("value(1)")) #Deletes a Knowledge agent.removeBelieve(expr("value(2)")) #Ask for a Knowledge agent.askBelieve(expr("value(1)")) True agent.askBelieve(expr("value(X)")) True