FWIW, Simpson's paradox is a "veridical" paradox, not a "vertical" paradox as noted in the article. Apparently veridical isn't yet accepted by spelling checkers

FWIW, Simpson's paradox is a "veridical" paradox, not a "vertical" paradox as noted in the article. Apparently veridical isn't yet accepted by spelling checkers. (As I'm writing, Chrome offers the single suggestion "vertical" for my "veridical".)