What is 'humpty-dumptying'? Do 'arguments from analogy' ever stand up? How do I know when someone is using 'weasel words'? This book intends to help anyone who wants to argue well and think critically. It includes such entries as: Principle of Charity; Lawyer's Answer; Least Worst Option; Poisoning the Well; Sentimentality; and Sunk Cost Fallacy.