G: Geography
 E: Entertainment
 H: History
AL: Arts and Literature
SN: Science and Nature
SL: Sports and Leisure
PH: Puzzle Hunts

CARD 1 (Upper Left)
 G: Chicago's O'Hare Airport's baggage code ORD is a contraction of the word
    "Orchard."
 E: The name "Daisy" is short for "Margaret"; for instance, Margaret Dumont
    (famous for the Marx Brothers films) was nicknamed "Daisy."
 H: The Leaning Tower of Pisa leaned north during its first five years of
    construction, but ever since then the tower has been leaning south.
AL: William Faulkner was actually born with the name "Falkner"; the name 
    change was the result of a typographical error.
SN: Ketchup can dissolve alumninum foil.
SL: The first pinball machine to have flippers had six of them.
PH: The solution to this puzzle involves Morse code.

CARD 2 (Middle Left)
 G: On a per-acre basis, the Louisiana Purchase in 1803 was cheaper
    than Seward's purchase of Alaska in 1867.
 E: The purpose of clapping the clapboard used during filming a movie is so 
    that the cast and crew can be alerted to the scene starting.
 H: Queen Elizabeth II and her son Prince Charles share the same surname.
AL: Although reviews of the premiere of Igor Stravinsky's ballet _The Rite 
    of Spring_ were bad, the audience was reasonably well-behaved.
SN: The world's largest rodents are the capybaras, which weigh on 
    average 100 pounds.
SL: All major league ballparks have home plate in the southwest corner.
PH: The categories should be taken in order, from top to bottom.

CARD 3 (Lower Left)
 G: The verb "to orient" has its origins in the fact that in medieval times
    it was common to have east pointing upwards on maps.
 E: A large proportion of the cast and crew of the 1950s film "The Conqueror" 
    (including John Wayne and Agnes Moorehead) contracted cancer, suspected
    to be from nuclear fallout from the filming location.
 H: Chinese water torture was used by ancient Chinese in the 17th century.
AL: There is a notaional system for human movement called Labanotation that 
    is used by choreographers to record modern dance.
SN: In the 1970s, most TV remote controls worked by ultrasound.
SL: The name "pigskin" for a football originated as a euphemism for 
    "pig's bladder skin".
PH: All trivia on this card can be verified within one WWW domain.

CARD 4 (Upper Right)
 G: San Francisco, CA and Santa Fe, NM are named after the same Catholic saint.
 E: The lyrics to the song "Louie Louie" were deliberately written to be
    meaningless.
 H: The astronomer Tycho Brahe wore an artificial nose, the actual one 
    lost in a duel when he was 20.
AL: "CGMBPY FKWVXJ QZ" are the next three columns in the linotype machines used
    to typeset text, after "ETAOIN SHRDLU."
SN: The Coriolis affect causes water to drain clockwise in the Northern
    hemisphere and counterclockwise in the Southern Hemisphere.
SL: The "G"s in "G-string" and "G-spot" stand for the same word.
PH: Exactly half of the statements in each category are false.

CARD 5 (Middle Right)
 G: Kaskasia, IL, lies East of the Mississippi River.
 E: The "Scooby-Doo" characters were based on characters from the '60s sitcom
    "The Many Loves of Dobie Gillis."
 H: The tune for "The Star-Spangled Banner" was taken from an 18th
    century drinking song.
AL: The word "tycoon" is one of the few English words to come from Chinese.
SN: Most American homes do not have the wiring infrastructure to support 
    240-volt appliances, except in New York State.
SL: Fig Newtons were named after Sir Isaac Newton.
PH: Each category encodes at least two letters in the message.

CARD 6 (Lower Right)
 G: Delaware has more miles of U.S. Interstate than Hawaii.
 E: Bulldogs are so named because they were bred to look like a medieval bull.
 H: Julius Caesar was born by cesarian section.
AL: The most famous Sherlock Holmes story, "The Hound of the Baskervilles," 
    was written after the story in which Holmes "dies" but before the story
    in which Holmes is "resurrected."
SN: Women have two fewer ribs than men.
SL: The phrase "ain't over until the fat lady sings" was coined in the 1970s 
    by an American sportswriter.
PH: A "false" statement indicates the presence of a "Dot".