>>>which your average son of Stratford had no access to.
He was probably educated at the local grammer school in Latin and the "classics".
And when he left Stratford he had a number of "lost years" between 1585 and 1592 so who knows what he was doing during that time.
He also came to London and wrote his best plays there so he must also have been influenced there.
Also remember many of his plays were "reconstructed" when the First Folio was produced, years after his death, so who knows what was "added" at that time, as no definitive scripts were left for many of the plays when he died.