At April's Castalia, second-year poet Evan Klavon posed riddles and demonstrated the difference between countable and uncountable infinity; first-year prose writer Ben Wirth went behind the scenes in the business of funny business; second-year poet Elizabeth Cooperman conjured images of both film and dating from a collection of mini-essays; and special guests Sonya Chung and UW professor Shawn Wong read from their new novels.