Q: Is a railroad engineer needed during NASCAR events?
A: Railroad engineers work on trains and railway systems. NASCAR events feature automobile races.
The answer is no.

Q: Did Harry Houdini's wife make psychics look foolish?
A: Psychics are people that claim to have special powers to talk to the dead. Harry Houdini gave his wife a code word to ask psychics to repeat after his death. The wife of Harry Houdini, Wilhelmina Beatrice "Bess" Rahner, asked several psychics for the code word and none knew it.
The answer is yes.

Q: Could you make the kitchen 'holy trinity' without celery?
A: The 'Holy Trinity' in cooking is a base used for soups, stews, and more. The ingredients of the Holy Trinity base are onions, bell peppers, and celery.
The answer is no.

Q: Can a greyhound walk on two legs?
A:
Greyhounds are dogs. Dogs walk on four legs.
The answer is no.