What were some of the tale a tale signs that Bill Clinton was lying

WISENBERG: He actually says at the beginning of his statement, “When I was alone with Ms. Lewinsky.” Well, right there he’s admitted both to perjury and obstruction of justice because he repeatedly was asked that [in his earlier deposition in the Jones case] and he would say, “Gosh, I just don’t have any recollection — all I remember is maybe when she delivered pizza.”