Wieman's words proved prophetic. Though Process and Reality has been called "arguably the most impressive single metaphysical text of the twentieth century," it has been little-read and little-understood, partly because it demands as Isabelle Stengers puts it "that its readers accept the adventure of the questions that will separate them from every consensus." Whitehead questioned western philosophy's most dearly held assumptions about how the universe works, but in doing so he managed to anticipate a number of 21st century scientific and philosophical problems and provide novel solutions.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Which publication is considered the most impressive metaphysical text?
Ah, so.. Process and Reality

Raleigh (/rli/; RAH-lee) is the capital of the state of North Carolina as well as the seat of Wake County in the United States. It is the second most populous city in North Carolina, after Charlotte. Raleigh is known as the "City of Oaks" for its many oak trees, which line the streets in the heart of the city. The city covers a land area of 142.8 square miles (370 km2). The U.S. Census Bureau estimated the city's population to be 439,896 as of July 1, 2014. It is also one of the fastest-growing cities in the country. The city of Raleigh is named after Sir Walter Raleigh, who established the lost Roanoke Colony in present-day Dare County.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the population of the North Carolina?
Ah, so.. unanswerable

Two contrasting viewpoints on time divide many prominent philosophers. One view is that time is part of the fundamental structure of the universea dimension independent of events, in which events occur in sequence. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instead part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events. This second view, in the tradition of Gottfried Leibniz and Immanuel Kant, holds that time is neither an event nor a thing, and thus is not itself measurable nor can it be travelled.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what order did Gottfried Leibniz believe events occur?
Ah, so..
unanswerable