Q--Was United Airlines blameless in worst crash in history?
A--My step-by-step reasoning: The Tenerife Airport disaster is the deadliest crash in aviation history. The Tenerife Airport disaster involved a Boeing plane and a Pan Am plane. Pan Am airlines competed with United Airlines and other US companies. Boeing is an American multinational corporation that designs and sells airplanes, rockets, satellites,and missiles.
So, the answer is yes.

Q--Will a sloth explode if it's not upside down?
A--My step-by-step reasoning: sloth can climb trees in various positions. sloth can crawl along the ground on their stomachs.
So, the answer is no.

Q--Is Alistair Darling in favor of Scottish independence?
A--My step-by-step reasoning: Alistair Darling was the chair of the Better Together Campaign. Better Together was the principal campaign for a No vote in the 2014 Scottish independence referendum, advocating Scotland continuing to be part of the United Kingdom.
So, the answer is no.

Q--Can a Sphynx cat be used for wool?
A--
My step-by-step reasoning: A Sphynx cat is a breed of cats that lacks hair. Wool is a soft smooth fabric derived from the hair of animals. Sphynx cats skin are covered in an oily sticky substance.
So, the answer is no.