Ruth Kempson

Ruth Margaret Kempson, FBA (born 26 June 1944) is a British linguist. She is Emeritus Professor of Linguistics at King's College, London.
In 1977, Kempson published "Semantic Theory", which discusses the concept of entailment in linguistics. A proposition (P) is entailed by another (Q) if P is true when Q is true and Q is false when P is false, but Q is not strictly defined if P is true. She was awarded a Fellow of the British Academy in 1989. She has made contributions to the theoretical framework of Dynamic syntax.