- Mature Protoplasmic Mammalian Astrocytes: Morphology, Interrelationships, and Implications for Function

What passes for knowledge are most often beliefs which we hold more or less tenaciously without any clear awareness as to what precisely we are claiming to know. Even when our beliefs happen to be true, our lack of precision and our ignorance of the grounds upon which these beliefs could be based permit us to hold other beliefs which are contradictory. (Stebbing, 1954, ix).