[MD] What is radical empiricism?

[David M]

DMB: radical empiricism; we are obliged 
to limit our assertions to what is known in experience.


DM: Help please? What does this mean? How do we experience
the levels that Pirsig asserts for example? How much of science do we
need to suspend as talking about unexperienced entities? What 
does 'known'mean here? Is this not positivism? Can you notice
patterns without memory? What is the status of memory in
radical empiricism? Is this what Pirsig says?