An Irish philosopher and an English philosopher had what issue between them?
John Gay (philosopher) John Gay (1699–1745), a cousin of the poet John Gay, was an English philosopher, biblical scholar and Church of England clergyman. The greatest happiness principle, Gay supposed, represented a middle ground between the egoism of Hobbes and Hutcheson's moral sense theory.
William Butler (alchemist) William Butler, Irish alchemist (c. 1534 – 29 January 1617), was, according to the "Compendium of Irish Biography", "a well-known alchemist, the pretended discoverer of the philosopher's stone, and of a powder for bringing the dead to life, was born in Clare about 1534. He died at sea, on his passage to Spain, 29th January 1617."