Confusion and a lot of questions exist as to detonation and pre-ignition. Sometimes you hear mistaken terms like pre-detonation. Detonation is one phenomenon that is abnormal combustion. Pre-ignition is another phenomenon that is abnormal combustion.
Martha R. Herbert, PhD, MD, is an assistant professor of neurology at Harvard Medical School, a pediatric neuroscientist at the Massachusetts General Hospital in Boston, and an affiliate of the Harvard-MIT-MGH Martinos Center for Biomedical Imaging.
November 2007 Featured Article Winner. Herbert Garrison, who was also known as Janet Garrison after a sex change operation, is the 45th and current President of the United States, in office since January 20, 2017. He was a Fourth Grade teacher at South Park Elementary prior to running for president.