From The New York Times:
A few days before a review of my latest book appeared in these pages, I wrote to my editor, saying I had seen an advance copy and how much I liked the color illustration of the yellow moon. He replied that I must be mistaken, since the Book Review doesn’t use color. The next weekend he wrote to say he couldn’t think what had come over him — he reads the Book Review every week, and had somehow not noticed the color. Odd. And yet these lapses can happen to the best of us. Ask yourself what the Roman number four on the face of the church clock looks like. Most people will answer it looks like IV, but almost certainly the truth is it looks like IIII.
Why are we so bad at knowing — in this case remembering — what passes through our own minds? The philosopher Eric Schwitzgebel, in “Perplexities of Consciousness,” contends that our minds, rather than being open-access, are largely hidden territory. Despite what we believe about our powers of introspection, the reality is that we know awfully little about what our conscious experience amounts to. Even when reporting current experience, we make divergent, confused and even contradictory claims about what it’s like to be on the inside.
More here.