Problem: Background: Hilary Whitehall Putnam (; July 31, 1926 - March 13, 2016) was an American philosopher, mathematician, and computer scientist, and a major figure in analytic philosophy in the second half of the 20th century. He made significant contributions to philosophy of mind, philosophy of language, philosophy of mathematics, and philosophy of science. At the time of his death, Putnam was Cogan University Professor Emeritus at Harvard University. He was known for his willingness to apply an equal degree of scrutiny to his own philosophical positions as to those of others, subjecting each position to rigorous analysis until he exposed its flaws.
Context: In the field of epistemology, Putnam is known for his "brain in a vat" thought experiment (a modernized version of Descartes's evil demon hypothesis). The argument is that one cannot coherently state that one is a disembodied "brain in a vat" placed there by some "mad scientist". This follows from the causal theory of reference. Words always refer to the kinds of things they were coined to refer to, thus the kinds of things their user, or the user's ancestors, experienced. So, if some person, Mary, were a "brain in a vat", whose every experience is received through wiring and other gadgetry created by the "mad scientist", then Mary's idea of a "brain" would not refer to a "real" brain, since she and her linguistic community have never seen such a thing. Rather, she saw something that looked like a brain, but was actually an image fed to her through the wiring. Similarly, her idea of a "vat" would not refer to a "real" vat. So, if, as a brain in a vat, she were to say "I'm a brain in a vat", she would actually be saying "I'm a brain-image in a vat-image", which is incoherent. On the other hand, if she is not a brain in a vat, then saying that she is a brain in a vat is still incoherent, but now because she actually means the opposite. This is a form of epistemological externalism: knowledge or justification depends on factors outside the mind and is not solely determined internally. Putnam has clarified that his real target in this argument was never skepticism, but metaphysical realism. Since realism of this kind assumes the existence of a gap between how man conceives the world and the way the world really is, skeptical scenarios such as this one (or Descartes' evil demon) present a formidable challenge. Putnam, by arguing that such a scenario is impossible, attempts to show that this notion of a gap between man's concept of the world and the way it is, is in itself absurd. Man cannot have a "God's eye" view of reality. He is limited to his conceptual schemes. Metaphysical realism is therefore false, according to Putnam.
Question: What else was notable about epistemology?
Answer: Man cannot have a "God's eye" view of reality. He is limited to his conceptual schemes. Metaphysical realism is therefore false, according to Putnam.

Problem: Background: Guy Carleton, 1st Baron Dorchester, KB (3 September 1724 - 10 November 1808), known between 1776 and 1786 as Sir Guy Carleton, was an Anglo-Irish soldier and administrator. He twice served as Governor of the Province of Quebec, from 1768 to 1778, concurrently serving as Governor General of British North America in that time, and again from 1785 to 1795. The title Baron Dorchester was created on 21 August 1786. He commanded British troops in the American War of Independence, first leading the defence of Quebec during the 1775 rebel invasion and the 1776 counteroffensive that drove the rebels from the province.
Context: In August 1783, Carleton was informed that Great Britain would grant the United States its independence. With his exit from New York imminent, Carleton asked to be relieved of his command. With this news, Loyalists began an exodus from the Thirteen Colonies and Carleton did his best to have them resettled outside the United States. At a meeting with George Washington, among others, to arrange for the implementation of those parts of the Treaty of Paris relating to the evacuation of New York City, then commanded by Carleton and still occupied by the British Army, many Loyalists and former slaves, Carleton refused to deliver over the human property to the Americans at the time of the British evacuation. Instead, he proposed a registry so that "the owners might eventually be paid for the slaves who were entitled to their freedom by British Proclamation and promises." Sir Guy noted that nothing could be changed in any Articles that were inconsistent with prior policies or National Honour. He added that the only mode was to pay for the Negroes, in which case justice was done to all, the former slaves and the owners. Carleton said that it would be a breach of faith not to honour the British policy of liberty to the Negro and declared that if removing them proved to be an infraction of the treaty, then compensation would have to be paid by the British government. To provide for such a contingency, he had a register kept of all Negroes who left, called the Book of Negroes, entering their names, ages, occupations, and names of their former masters. The Americans agreed to this, but as far as can be determined, the Crown never paid compensation. The British transported about 3,000 freedmen and other Loyalists to Nova Scotia for resettlement. As the colony struggled, some of the freedmen later chose in the early 1790s to go to Freetown, Sierra Leone, where the British set up a new colony, which included the Black Poor from London. Washington disagreed with Sir Guy's actions and wrote: "...the measure is totally different from the letter and spirit of the Treaty but waiving the specialty of the point, leaving this decision to our respective Sovereigns I find it my duty to signify my readiness in conjunction with you to enter into agreements, or take any measures which may be deemed expedient to prevent the future carrying away any Negroes or other property of the American people." On 28 November, the evacuation was finished, and Carleton returned to England. John Campbell of Strachur succeeded him as Commander-in-Chief, North America, although the post was then much reduced in scope.
Question: what did he do in that role?
Answer:
Carleton refused to deliver over the human property to the Americans at the time of the British evacuation.