"The Hippocratic Oath", he said.

"What about the Hippocratic Oath?", I asked.

"What is it?", he asked.

"It's an ethical code, that doctors swear to," I said.

"I know that," he said. "But what is the Hippocratic Oath?"

"Oh. First, do no harm is how it starts out," I replied.

"And what next", he asked.

"Well, " I said, "I guess the next thing is do harm."