I guessed FIVE

A little boy came home from kindergarten with a blue ribbon. When his mommy asked him “What is the blue ribbon for?” he proudly announced, “I won!”
When pressed for details he simply said, “The teacher asked all of us to guess how many legs a cow has. When my turn came, I guessed FIVE.”
“Five?” his mother gasped, “but a cow only has FOUR legs.”
“I won because my guess was the closest.”

Someone who is responsible

End of story!