A rabbit, hiding behind a tree sees another rabbit sitting outside his burrow, tippy-tapping on his typewriter.

Along comes a fox, out for a walk.

Fox

"What are you working on?"

Rabbit

"My dissertation."

Fox

"Hmmm. What's it about?"

Rabbit

"Oh, I'm writing about how rabbits eat foxes."

Fox

"That's ridiculous! Any fool knows that rabbits don't eat foxes."

Rabbit

"Sure they do, and I can prove it. Come with me."

They both disappear into the rabbit's burrow. After a few minutes, the rabbit returns, alone, to his typewriter and resumes typing.

Soon, a wolf comes along and stops to watch the hardworking rabbit.

Wolf

"What's that you're writing?"

Rabbit

"I'm doing my dissertation on how rabbits eat wolves."

Wolf

"You don't expect to get such rubbish published, do you?"

Rabbit

"No problem. I can prove it to you. Follow me."

The rabbit and the wolf go into the burrow, and again the rabbit returns by himself, after a few minutes, and goes back to typing.

The scared rabbit comes out of hiding and asks the other rabbit what is going on.

He says, follow me and I'll show you since you're a fellow rabbit.

They both go inside the burrow.

In one corner, there is a pile of fox bones. In another corner, a pile of wolf bones. On the other side of the room, a huge lion is belching and picking his teeth.

The moral of the story is?

It doesn't matter what you choose for a dissertation topic.

It doesn't matter what you use for data.

What matters is having a powerful dissertation advisor.