Because the order of a stack of DVDs is considerably more fragile than the order of a static list of items on a webpage. The next person to receive the stack of DVDs and make the decision will not necessarily receive them in the same order. That was the whole point of describing the choice as selecting from a stack of DVDs.
(Late to the party, but what the heck.) Rather than a stack, a good trick to avoid the tip-off might have been to describe the set of movies as “a scattered mess of DVDs in a box; in no particular order, they are...”
Because the order of a stack of DVDs is considerably more fragile than the order of a static list of items on a webpage. The next person to receive the stack of DVDs and make the decision will not necessarily receive them in the same order. That was the whole point of describing the choice as selecting from a stack of DVDs.
(Late to the party, but what the heck.) Rather than a stack, a good trick to avoid the tip-off might have been to describe the set of movies as “a scattered mess of DVDs in a box; in no particular order, they are...”
I will probably adopt something like this in future iterations of this exercise.