Catalan is split in two major dialectal blocks: Eastern Catalan, and Western Catalan. The main difference lies in the treatment of unstressed a and e; which have merged to // in Eastern dialects, but which remain distinct as /a/ and /e/ in Western dialects. There are a few other differences in pronunciation, verbal morphology, and vocabulary.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What have a and e done in eastern dialects?
Ah, so.. merged

In 1918 Whitehead's academic responsibilities began to seriously expand as he accepted a number of high administrative positions within the University of London system, of which Imperial College London was a member at the time. He was elected Dean of the Faculty of Science at the University of London in late 1918 (a post he held for four years), a member of the University of London's Senate in 1919, and chairman of the Senate's Academic (leadership) Council in 1920, a post which he held until he departed for America in 1924. Whitehead was able to exert his newfound influence to successfully lobby for a new history of science department, help establish a Bachelor of Science degree (previously only Bachelor of Arts degrees had been offered), and make the school more accessible to less wealthy students.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In which year did Whitehead relocate to Africa?
Ah, so.. unanswerable

The use of uranium in its natural oxide form dates back to at least the year 79 CE, when it was used to add a yellow color to ceramic glazes. Yellow glass with 1% uranium oxide was found in a Roman villa on Cape Posillipo in the Bay of Naples, Italy, by R. T. Gunther of the University of Oxford in 1912. Starting in the late Middle Ages, pitchblende was extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jachymov in the Czech Republic), and was used as a coloring agent in the local glassmaking industry. In the early 19th century, the world's only known sources of uranium ore were these mines.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What was the latest year in recorded history that uranium oxide was used?
Ah, so..
unanswerable