premise: How to diagnose collie eye in shelties<br>Test your dog's eyesight. If you want to know if your sheltie has cea, then test his eyesight. In mild cases, your dog may be able to see well enough to cope.
hypothesis: Your dog can test their own eye sight.
reason: The text wants the owner to test eye sight. It's not possible for a dog to do this. The system probably lacks common sense.