“Is it always the same?” said the doctor.
“Yes doctor,” said the patient.
“Let me see,” said the doctor, consulting his notes. “A three legged, long nosed, five armed creature with protuberant eyes, and an indigo tongue with which it appears to occasionally lick its long ears, which resemble those of a rabbit. It seems a little perplexed, worried even, as if it doesn’t know what exactly it is doing, hovering over your left shoulder. It is lemon yellow all over and has a slight paunch. It is about a foot tall. You were shaving when you first noticed it, in the mirror. You blinked repeatedly, but the apparition persisted. You have never before in your life suffered from hallucinations. Is all that correct?”
“Yes, doctor, exactly,” said the patient. “Except for the colour. It is a leaf green, rather than lemon yellow, I would say.”
The doctor peered at the air above the patient’s left shoulder. He blinked and leaned forward for a closer look.
“Hmm, I really must beg to differ, Mr. D,” he said. “There is no doubt at all that it is lemon yellow.”