Example 22: Is Indiana Jones a Rational Doctor?
[Indiana Jones, in the climax of the movie “Indiana Jones and the Last Crusade”. Indiana
Jones, his father, and the Nazis have all converged at the site of the Holy Grail. The two
Joneses refuse to help the Nazis reach the last step, so the Nazis shoot Indiana’s dad.
Only the healing power of the Holy Grail can save the senior Dr. Jones from his mortal
wound. Suitably motivated, Indiana leads the way to the Holy Grail, but there is one final
challenge: he must choose between literally scores of chalices, only one of which is the cup
of Christ. While the right cup brings eternal life, the wrong choice is fatal. The Nazi leader
impatiently chooses a beautiful gold chalice, drinks the holy water, and dies the sudden
death that follows the wrong choice. Indiana picks a wooden chalice, the cup of a carpenter.
Exclaiming “There’s only one way to find out” he dips the chalice into the font and drinks