Are There Limits to Cognition? 121objectively real world continuity alongside what is “sub-
jectively” cognizable through percept and concept. They
believe they can determine how this objective reality is
constituted by inductive inference from their percepts.
Addendum to the new edition (1918)Certain ideas based on natural-scientific study will al-
ways pose distractions for the kind of unprejudiced obser-
vation of experience in percepts and concepts that I have
tried to present in the preceding discussion. According to
modern science, for instance, the eye perceives colors in
the light spectrum from red to violet. Beyond violet, there
are forces of radiation corresponding to no color-percept
in the eye, but rather only to a chemical effect. In the same
way, beyond the red limit, there are radiations that mani-
fest only as warmth. Consideration of these and similar
phenomena leads to the view that the range of the human
perceptual world is determined by the range of the human
senses, and humans would face an altogether different
world if they had additional, or completely different,
senses. Anyone who indulges in extravagant fantasies, for
which the brilliant discoveries of current natural science
offer quite seductive opportunities, can easily conclude
that, after all, nothing enters the human field of observa-
tion but what can affect the senses formed by our bodily
organization. We have no right, then, to regard what we
perceive because of our bodily organization as any stan-
dard of reality. Each new sense would place before us a
different picture of reality.