NaN == NaN is falsy (so is NaN === NaN, for that matter). But when I played the game, it looked to me like the game correctly claimed it is falsy. (Though I'm

NaN == NaN is falsy (so is NaN === NaN, for that matter). But when I played the game, it looked to me like the game correctly claimed it is falsy. (Though I'm not 100% sure I know what the notation the game uses means.)