excerpts: "...Nabokov ...refers to me on p. 542 of his novel
[ADA] as an “invented philosopher.” In my Ambidextrous Universe (Basic
Books, 1964), in a section on Kant’s approach to space and time, I quote two
lines from Pale Fire....but credited the poem instead to his invented poet, John
Shade. Nabokov returns the joke by calling me “invented,” since my book appeared
on Terra, a perhaps imaginary earth, whereas the action of ADA occurs on
Anti-Terra, an earth."