Cow: "Hmmm-hmm-hmmm ...
(he looks up and reads the sign) 'I know I am a
(coe).' ... That doesn't sound right."
(A farmer comes in, grumbling)
Farmer: "Mumble-mumble -- You're not a coe, you're a cow!"
Cow:
(brightly) "I get it! Hmmm-hmm-hmm -- 'I
(now) I am a cow!'"
Farmer:
(walking around, the cow looks confused) "Grumble-grumble-grumble ... Listen -- 'I KNOW I AM A COW.'"
Cow:
(smug) "You're not a cow!"