premise: Mount Rushmore was created only by Abraham Lincoln.
hypothesis: Mount Rushmore . Sculptor Gutzon Borglum created the sculpture 's design and oversaw the project 's execution from 1927-1941 with the help of his son , Lincoln Borglum . Mount Rushmore features 60 ft sculptures of the heads of four United States presidents : George Washington ( 1732 -- 1799 ) , Thomas Jefferson ( 1743 -- 1826 ) , Theodore Roosevelt ( 1858 -- 1919 ) , and Abraham Lincoln ( 1809 -- 1865 ) .