Korzybski had accepted that ‘…all we know is a joint phenomenon of the observer and the observed…’ One could no longer study how people know what they presume they know (epistemology) without scientific understanding (at a given date) of the ‘physical’, ‘neuro-biological’, ‘psycho-social’, ‘linguistic’, etc., factors affecting human observers.
— Bruce Kodish, Korzybski: A Biography