They may struggle to hide them. Probably the most common early sign is short-term memory loss.

VOA: special.2011.02.08

Pentagon Press Secretary Geoff Morrell says Gates urged both leaders to avoid a repetition of the "painful memory" of the five-month government formation process in 2005.

VOA: standard.2009.12.12

"The one thing which one can say about this election -- and we haven't been able to say this for any election within living memory -- is that the only certain thing is that we cannot predict the outcome, even on the day before the poll."

VOA: standard.2010.05.05