The Speaker of the House. ( ranked In line for presidency after the VP)
The flexible response was created and implemented during former President John F. Kennedy's administration at the year 1961 as a measure to counteract the New Look policy of former President Dwight Eisenhower in his policy of conducting a massive military action in case of war.
Semantics is the study of word meanings.
It is one part of linguistics, other being syntax: the study of sentence structure, phonology and phonetics: the study of sounds, morphology: the study of word structures and pragmatics: the study of actual use of language.