“Not only do we consciously perceive only a very small proportion of the sensory signals that bombard us, but when we do, it is with a time lag of at least one-third of a second. . . . the information that we attribute to the conscious ‘present’ is outdated by at least one-third of a second. The duration of this blind period may even exceed half a second when the input is so faint that it calls for a slow accumulation of evidence before crossing the threshold for conscious perception.”
