The Bard Of 30 Rock

Will someone please buy Brian Williams a reference almanac? During his intro to Monday's "Making A Difference" story about Chicago students who perform Shakespeare, Brian said of the Bard, "And while he's been gone for over 400 years...." Not quite. Shakespeare died in 1616, so he's only been gone for 393 years. I would expect this type of mistake from a lesser scholar, but et tu, Brian? Something is rotten in the state of 30 Rock. Remember: The fault, dear Brian, is not in our producers but in ourselves. A fact checker, a fact checker! My kingdom for a fact checker! Perhaps the studio lights were so bright that Brian couldn't read his teleprompter. If so, he should have proclaimed, "Out, damned spotlight!"