Answer:
It is true that "Pigs can fly"
Explanation:
If a creature is an astronaut if it likes mud and every pig likes mud, then every pig is an astronaut.
Saying that if a creature cannot fly then it is not an astronaut is the same as saying that all astronauts fly. Since all pigs are astronauts, pigs can fly.
The statement that "Pigs can fly" is true