John Hawthorne, Knowledge and Lotteries, p. 168n19:
Suppose... there were an oracle who could resolve skeptical doubts. The philosopher goes running to the oracle to find out if the world was created, complete with pseudo-memories, five minutes earlier. Is it really so strange to suppose that the philosopher, before arriving at the oracle, does not know he has been around for a while even though the dullard does know?
The sensitive invariantist should answer, "I say no, you say yes, and you will change your mind."