Newington is a census-designated place (CDP) in Fairfax County, Virginia, United States. The population was 12,943 at the 2010 census. The 2010 census showed a significant decrease after half the population was split off to the newly created Newington Forest CDP. Using only the above description and what you know about the world, "Before the population was half way split to the Newington Forest CDP, it was higher." is definitely correct, incorrect, or inconclusive? 