“Supposing a tree fell down, Pooh, when we were underneath it?”
“Supposing it didn’t,” said Pooh after careful thought.
Piglet was comforted by this.

A. A. Milne (1882-1956) English poet and playwright [Alan Alexander Milne]

House at Pooh Corner, ch. 8 “Piglet Does a Very Grand Thing” (1928)
    (Source)