Dear Dr. Boli: You’ve written about many remarkable inventions in your Celebrated Magazine. Who do you think is the greatest inventor of all time? –Sincerely, Miss Prunespigot’s Seventh-Grade History Class.

Dear Young Ladies and Gentlemen: In Dr. Boli’s opinion, the greatest inventor of all time was the unsung hero who first stood in his bathroom, looked down into the toilet, and said, “You know, we have the technology to turn that water blue.”