Karl Popper's methodology can be seen as the situational logic of rese
arch. Popper called his method ''Epistemology without a Knowing Subjec
t.'' It was dismissed as metaphysical by those who refuse to give up a
n ideal knowing subject (a perfect human inductive processor). This ar
ticle surveys the failure of modem discussions of this ideal, from the
earliest (the writings of Sir Francis Bacon) to the latest (Kripke).
The knowing subject exits at last, but leaves behind interesting resul
ts. The ideal knowing subject embodied ideal rationality, outside cult
ure and history. Giving up this ideal invites us to integrate science
with its background, to grade rationality (from magic to science), and
to integrate different degrees of rationality under one rule.