I.Q.

The lines spoken by Walter Matthau as Einstein, "I'd rather be an optimist and a fool than a pessimist and right," "Time is an illusion," and "God does not play dice," are all actual Albert Einstein quotations.

During the I.Q. test, one of the questions reads "Todd has $d, Mark has Four Times as Much as Todd, and Cassandra has Four Dollars More than Todd. Together They Have $.76. What is d?" This card has two mistakes, the first being a misprint with the punctuation before the 76 making it appear to be 76 cents and not 76 dollars. The correct answer to this question would be 12. [d+4d+(d+4)=76 is simplified to 6d=72, and d=12]. He picks the wrong answer. (If you assume that 'together' implies just Mark and Cassandra then the answer is $14.40 which isn't an option.)

Several characters' names are given incorrectly in the credits; Stephen Fry's character is spelled "James Morland" without the E, Lou Jacobi's character Kurt Gödel is spelled with no umlaut over the O, and Tony Shalhoub's character is titled "Bob Watters," not Bob Rosetti as given throughout the film.