From The Wall Street Journal:
A new paper in the journal Trends in Cognitive Sciences by the New York University philosopher Ned Block demonstrates just how hard it is to tell if we really know what we see. … Prof. Block focuses on a classic experiment originally done in 1960 by George Sperling, a cognitive psychologist at the University of California, Irvine.

For the full story, please visit http://online.wsj.com/articles/do-we-know-what-we-see-an-experiment-sows....