His comments have ignited a firestorm of criticism from health officials and activists who said his words were unrealistic and unscientific.

VOA: standard.2009.03.29

It is unrealistic,he says, to expect him to have delivered on most of his promises, less than a year after his inspirational address to the Muslim world.

VOA: standard.2010.05.11

Often,an entrepreneur's ideas do not fit conventional wisdom or they seem unrealistic.

VOA: standard.2010.01.31

"We're not willing to pull the hand back yet, because we think there's still some opportunity, but I think concerns out here of some kind of a grand bargain are completely unrealistic."

VOA: standard.2009.05.05