Nevada’s highest court is being asked if a political group defamed casino mogul Sheldon Adelson in 2012 with an Internet ad alleging that he used prostitution-tainted money from casinos in China to fund Republican presidential campaigns in the United States. A key question during Nevada Supreme Court oral arguments on Monday was whether online point-and-click “hyperlinks” are comparable to footnotes on a printed page – and whether they were enough to inform ad readers that Adelson denied the prostitution claim when it was made in a civil lawsuit.