(Observer.com) –In the last seven days, the deluge of new Wall Street scandals has been constant, fascinating and incredibly confusing. Helpfully, one tie that binds is that nearly every major accusation has been accompanied by denials from the accused, but beyond that things can get confusing. What’s the difference between the mortgage deal named Aquarius and the one called Abacus? Did Moody’s and other credit rating agencies fool the public, or were they fooled? Was Lehman the only bank that used a book-cooker like Repo 105? What, again, was Chooch? Here is a brief and alphabetized guide to recent scandals.