According to Generation X sources, the recent attack on America may have rendered cynicism and irony permanently obsolete. 'Remember the day after the attack, when all the senators were singing 'God Bless America,' arm-in-arm?' asked Dave Holt, 29. 'Normally, I'd make some sarcastic wisecrack about something like that. But this time, I was deeply moved.' Added Holt: 'This earnestness can't last forever. Can it?' 