Woman brings a duck to Vet. Vet says, Your duck is dead. Woman says, Are you sure? Yes, says Vet. How can you be sure you've done no tests. Vet brings in a labrador retriever which sniffs the duck and shakes his head. Next, a cat which sniffs the bird and shakes its head. Vet says, Sorry, but as I said your duck is dead. Vet hands woman a bill. She cries, $820 to tell me my duck is dead! Vet says, If you had taken my word for it the bill would be $20 but Lab Reports and Cat Scans cost extra.