The words and examples make better sense if you read today's entry first.
Today (a la Libby):*Libby, former chief of staff to Vice President Dick Cheney, was found guilty of perjury and obstruction of justice for exposing undercover CIA agent Valerie Plame Wilson's identity. It was done to punish her husband, Joseph Wilson, for questioning the Bush administration's rationale for going to war with Iraq. Libby claimed to have forgotten conversations in which Plame Wilson's identity was discussed. He was sentenced to 2.5 years in prison.
sich errinern -- to remember
Ich kann mich nicht errinern. (I cannot remember.)
Yesterday (a la the jury):
wahr -- true
Das is gar nicht wahr. (That is not true.)