Premise: Brendan Francis Aidan Behan (christened Francis Behan) ( ; Irish: "Breandán Ó Beacháin" ; 9 February 1923 – 20 March 1964) was an Irish Republican, poet, short story writer, novelist, and playwright who wrote in both English and Irish. He is widely regarded as one of the greatest Irish writers and poets of all time.
Hypothesis: Brendan Francis Aidan Behan is not known as the greatest irish writer of all time