Matrix logic or logic grid puzzles challenge you to figure out the characteristics of several people, using a series of clues, marking "yes" answers with an O and "no" answers with an X in a grid of boxes. You can see an example grid in this Wikipedia article. My 12-year-old Nicholas enjoys matrix logic almost … Continue reading Matrix Logic: The New Baby’s Relatives
This columnist argues that teenagers shouldn't be taught about contraception because studies show that younger, poorer, unmarried people using oral contraceptives or condoms are more likely to get pregnant than older, more affluent, married people using the same devices. It's an interesting attempt at logic, but it leaves out a crucial point: Any contraceptive method that requires action … Continue reading Anything works better when you know how to use it!