The puzzles don't seem comparable, at least as presented by the article. With the cards, you are given cards where you know if the if side of the problem is tr

The puzzles don't seem comparable, at least as presented by the article. With the cards, you are given cards where you know if the if side of the problem is true or false and cards where you know the tend side of the problem is true or false. With the people drinking beer, you are never given anyone cases to check where the then side of the problem is right or wrong (everyone is drinking or not drinking, there are no examples of people whose age you know but you don't know if they are drinking). The people drinking problem is similar to if you gave people cards only with the numbers shown. I suspect the percentage of people getting the number part right would be much higher. (Note, in the actual age/drinking situation, the experiment is designed to be the same; it just appears the author didn't explain that well in this piece.)