We remember the Marshall Plan today not because Secretary of State George Marshall gave a great speech (he didn't) or because President Truman maneuvered the bill creating the staff and bureaucracy of the European Recovery Administration through Congress.
We do not remember the Marshall Plan today because of George Marshall's speech.  
mnli hypothesis: We do not remember the Marshall Plan today because of George Marshall's speech.   premise: We remember the Marshall Plan today not because Secretary of State George Marshall gave a great speech (he didn't) or because President Truman maneuvered the bill creating the staff and bureaucracy of the European Recovery Administration through Congress.