You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

Powdered sugar, also called confectioners' sugar, icing sugar, and icing cake, is a finely ground sugar produced by milling granulated sugar into a powdered state. It usually contains a small amount of anti-caking agent to prevent clumping and improve flow. Although most often produced in a factory, powdered sugar can also be made by processing ordinary granulated sugar in a coffee grinder, or by crushing it by hand in a mortar and pestle.
Solution: is confectionary sugar the same as powdered sugar?
Why? The question is a yes/no question, and it is answerable based on the given passage.

New input: Some family names do exist in Iceland, most commonly adaptations from last name patronyms Icelanders took up when living abroad, usually Denmark. Notable Icelanders who have an inherited family name include former prime minister Geir Haarde, football star Eiður Smári Guðjohnsen, entrepreneur Magnús Scheving, film director Baltasar Kormákur Samper, actress Anita Briem and member of parliament (and former news reporter) Elín Hirst. Before 1925, it was legal to adopt new family names; one Icelander to do so was the Nobel Prize-winning author Halldór Laxness, while another author, Einar Hjörleifsson and his brothers all chose the family name ``Kvaran''. Since 1925, one cannot adopt a family name unless one explicitly has a legal right to do so through inheritance. (The law was amended in 1991 and 1996.)
Solution:
do all last names in iceland end in son?