Implications for understanding consciousness are considered by focusin
g on two behaviors whose mutual disparity indicates blindsight. Among
the topics are: (a) the basis on which people report seeing something
in particular; (b) two interpretations of blindsighted subjects' force
d-choice guessing as affected by perceptual judgments outside subjects
' awareness or as based on ''pure perceptual knowledge'' of which subj
ects have awareness, though this ''knowledge'' is nonconsciously acqui
red; (c) whether blindsight is ''behavior divorced from awareness''; a
nd (d) an interpretation of blindsight as a matter of responding to in
ternal occurrences.