There may be several types of knowledge, but there are only two important ones.
What is given out under the heading of science or given out by schoolteachers or in textbooks is generally considered knowledge.
What comes out of books such as the bible or out of ‘channelers’ or mediums is another matter. Some call this beliefs, speculation or nonsense, depending on the point of view of the speakers.
When you wake up in the morning, remembering your dream, you know something as well. In other words knowledge does not equal knowledge.
We can distinguish knowledge derived from what you can see or hear from knowledge of for example what you remember or know from previous lifetimes or of things you feel that you just ‘know’.
Scientists usually disregard or categorically exclude the latter from the realm of knowledge and classify it as fantasy or worse.
However if we distinguish mind from matter and the spirit from the flesh, it well behooves us to distinguish sense knowledge from inner knowledge!
Therefore there are two main types of knowledge:
1) Knowledge derived from the senses, observation, experimentation.
2) Knowledge from within, intuition, revelation, (divine) inspiration.
Thus we can say there is inner knowledge and outer knowledge. The main error and problem of many scientists has been not to balance these two types of knowledge.
The great philosopher of all times said:
“All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.” Immanuel Kant
He was wrong!