 Reply: Memory contents are wide, and so by Block’s own reasoning they will themselves undergo the representational shift to the Inverted-Earth complementary color. Thus, your post-shift memories of good old Earth are false. When you say or think to yourself, “Yes, the sky looks as blue as it did thirty years ago,” you are not expressing the same memory content as you would have when you had just arrived on Inverted Earth. You are now remembering or seeming to remember that the sky looked yellow, since for you “blue” now means yellow. And that memory is false, since on the long-ago occasion the sky looked blue to you, not yellow; memory is not after all a reliable check on the sensory qualities. (Lycan (1996) takes this line; Tye (1998) expands it in more detail.)