Original sentence: (born February 7, 1943) is an American Holocaust denier who is best known as the author of the Leuchter report, a pseudoscientific document  that alleges there were no gas chambers at Auschwitz-Birkenau
Edited sentence: (born February 7, 1943) is an American Holocaust denier who is best known as the author of the Leuchter report, a scientific document  that alleges there were no gas chambers at Auschwitz-Birkenau