An angel comes down to you with two arks, ark A and ark B. You may choose to take either ark A or both arks A and B.
Ark A has either the Mona Lisa, worth millions of dollars, or a worthless spider, and ark B has a goblet worth 1000.
The obvious choice would be to take both, right? But here's where it gets difficult:
40 days ago, the angels made a prediction about what you would choose. If they thought you would take both, the put the spider in ark A. if they thought you would just take ark A they put the Mona Lisa in it. Remember that they are almost certainly right.
I see two ways to look at this:
(1) You take both; what they predicted 40 days ago barely makes an impact on your choice now, why waste the $1000 cup?
(2) Taking both would only get you the Mona Lisa under the assumption that the angels were wrong, so that is obviously the wrong choice; the angles are almost certainly right, in which case taking ark A would get you the Mona Lisa.
Which would you take?