It's a beautiful day in the forest and a rabbit is sitting outside his burrow, typing away on his laptop.
Along comes a fox.
Fox: "What are you working on?"
Rabbit: "My thesis paper to graduate from University."
Fox: What is 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: "Come with me and I'll show you!"
They both disappear into the rabbit's burrow. After a few minutes, gnawing on a fox bone, the rabbit returns to his laptop and resumes typing.
Soon a wolf comes along and stops to watch the hard working rabbit typing.
Wolf: "What's that you are writing?"
Rabbit: "I'm doing a thesis on how rabbits eats wolves."
Wolf: "You don't expect to get such garbage published, do you?"
Rabbit: "No problem. Do you want to see why?"
The rabbit and the wolf go into the burrow, and again the rabbit returns by himself. This time he is patting his stomach. He goes back to his typing.
Finally a bear comes along.
Bear: "What are you doing?"
Rabbit: "I'm doing a thesis on how rabbits eats bears."
Bear: "Well that's absurd!"
Rabbit: "Come into my home and I'll show you."
Inside the rabbit's burrow, the bear sees in one corner a pile of fox bones. In another corner is 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:
It doesn't matter what you choose for a thesis topic. It doesn't matter what you use for your data. It doesn't even matter if your topic makes sense. What matters is who you have for a thesis advisor.