"Common action does something that common presence does not do," said Clark McCauley, a professor of psychology at Bryn Mawr College who specializes in group dynamics.
"That's not a common presence in a historical library," Montanari told me.
A paanwallah is a common presence on Indian streets, busily slathering pastes, sprinkling ingredients and folding leaves.
Until now, legitimate businesses have struggled to build a common presence in the region.
Experts suggest that the common presence of peanuts in Western diets and a preference for the dry-roasted type are the reasons.
In bands led by Orrin Evans, Russell Gunn, Dee Dee Bridgewater and others, the tenacious young drummer Ali Jackson lights up the music; he's a slightly more common presence around New York clubs these days, which is a good thing.
Federal investigators said, however, that while these cases were a serious blow to organized crime's efforts to infiltrate the stock market, criminal activity was not anywhere near a common presence in the financial world.
Others credit the now common presence of private armed guards on many ships, a trend that accelerated starting in 2010, when various countries agreed to allow ships flying their flags to carry armed personnel.
Their common presence in the heavily cratered terrain is another indicator that conditions on early Mars were much warmer and wetter than they are today.
At the recent launch of the Good Society report by Church Action on Poverty and Churches Together in Britain and Ireland, Canon Padraig Gallagher of St Teilo's Church, Swansea, said he believes churches are the common factor and common presence in times of hardship.
