Whereas I didn't realize they were links, and never thought to click on the oddly worded text below the examples. For others like me, the plain text label in a square box below the listings that says stilted things like "The one on the left does" expands when clicked to give a useful explanatory paragraph. Seems like a good approach, but I could have used a better affordance: a cursor change on hover, underlined blue text, even maybe a tool tip that says "click me for the answer you idiot".