For ten points, name this author of Treatise Concerning the Principles of Human Knowledge, who presented his "immaterialist hypothesis" that "to be is to be perceived" in his Three Dialogues between Hylas and Philonous.
Near the end of his life, he became a fanatical devotee of tar-water, and even penned the poem "On Tar" in its honor. He lived in Rhode Island from 1728 until 1732, never receiving the funds he expected to establish a college in Bermuda, and in the meantime writing Alciphron, or the Minute Philosopher. In his best-known work, one of the characters represents John Locke, to whose materialism this man was opposed. For ten points, name this author of Treatise Concerning the Principles of Human Knowledge, who presented his "immaterialist hypothesis" that "to be is to be perceived" in his Three Dialogues between Hylas and Philonous.
Near the end of his life, he became a fanatical devotee of tar-water, and even penned the poem "On Tar" in its honor.
George {Berkeley}