Columbia subject headings:
Counterfactuals (Logic)--History--18th century.
Hume, David, 1711-1776.
Harvard subject headings:
Counterfactuals (Logic)--History--18th century.
Hume, David, 1711-1776
Princeton subject headings:
Counterfactuals (Logic)--History--18th century.
Hume, David, 1711-1776.