Look it up!
   Hey, when you run into a word you don't know, grab your dictionary. That's a rule you should follow in and out of class — and in life. It's a good habit to develop. 
    So, look up “tautology” or “conundrum” or whatever word you need to find in your handy, dandy American Heritage Dictionary. Or head to the World Wide Web for a dictionary link. (Believe me. The older method of reaching over and picking up the paperback dictionary is a lot quicker. Just don't knock over your beer!)