Premise: Roger Keith `` Syd '' Barrett ( 6 January 1946 -- 7 July 2006 ) was a British musician , composer , singer-songwriter , and painter . Best known as a founder member of the band Pink Floyd , Barrett was the lead singer , guitarist and principal songwriter in its early years and is credited with naming the band .
Hypothesis: Pink Floyd's principal songwriter was Syd Barrett.
Label: ENTAILMENT