Here's the problem:
Every afternoon the three little pigs take an ice cream break. They head to the closest ice cream shop, where each orders a double-dip cone. There are only two kinds of double dips that the pigs ever order. It's either a double-dip vanilla cone or a licorice-chocolate combination.Sweetling and I think that there is a misprint in the book. We can come up with only one scenario of orders which meet all the criteria of the problem.
If pig #1 orders vanilla-vanilla, then pig #2 orders the other. Either pig #1 or pig #3 orders vanilla-vanilla, but they never do so on the same day. Pig #2 and Pig#3 never both order the licorice-chocolate combination the same day.
Which of the three little pigs ate a vanilla-vanilla cone yesterday and will order a licorice-chocolate cone today?