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.
Martha Wayles Skelton Jefferson, born Martha Wayles (October 30 [ O.S. October 19] 1748 â September 6, 1782) was the wife of Thomas Jefferson, who was the third President of the United States. She was a widow at her second marriage, as her first husband had died young.