Both Uses

Harry S. Truman
in
Zen and the Art of Motorcycle Maintenance
(Auto-generated)

Harry Truman, of all people, comes to mind, when he said, concerning his administration's programs, "We'll just try them —and if they don't work — why then we'll just try something else."†
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And what Harry Truman said, really, was nothing different from the practical, pragmatic attitude of any laboratory scientist or any engineer or any mechanic when he's not thinking "objectively" in the course of his daily work.†
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Definitions:

(1) (Harry S. Truman)
33rd U.S. president, who took office at the end of World War II, authorized the use of atomic bombs on Japan, and led early Cold War efforts to contain communism (1884-1972)

Truman became president in 1945 when Franklin D. Roosevelt died, and later won election in his own right in 1948. He made the decision to use atomic bombs on Hiroshima and Nagasaki, hoping to force Japan’s surrender and avoid a long, bloody invasion. After the war, he helped shape U.S. policy in the early Cold War, announcing the Truman Doctrine to "contain" the spread of communism and supporting European recovery through the Marshall Plan and the formation of NATO.

At home, Truman ordered the desegregation of the U.S. armed forces and faced major labor and economic challenges after the war. He also led the United States into the Korean War and made the controversial decision to remove General Douglas MacArthur from command when MacArthur publicly challenged presidential policy.
(2) (meaning too rare to warrant focus)
Much less commonly, Truman can refer to anyone with that name.