Two tree Surgeons go into the pub after a hard day's work. They're sat drinking for a while when a very smartly dressed man walks in and orders a drink. The two began to speculate about what the man did for a living.
"I'll bet he's an accountant." said the first chap.
"Looks more like a stockbroker to me." argued the second. They continued to debate the subject for a good while until eventually the first chap, a Climber, needed to use the toilet. On walking in, he saw the smartly dressed man standing at a urinal.
"Excuse me mate, but me and my friend have been arguing over what a smartly dressed fella like you does for a living?" the Climber said to the man.
Smiling the man replied, "I'm a logical scientist."
"A what?" asked the Climber.
"Let me explain" the man continued, "Do you have a goldfish at home?"
A bit puzzled, but intrigued the Climber decided to play along, "Yes, I do as it happens."
"Well then it's logical to assume that you either keep it in a bowl or a pond. Which is it?"
"A pond" the Climber replied.
"Well then it's logical to assume that you have a large garden." The Climber nodded his agreement. So the man continued, "which means it's logical to assume you have a large house."
"I have a 6 bedroom house that I built myself." the Climber said proudly.
"Given that you have such a large house, it's logical to assume that you are married..."
The Climber nodded again, "Yes, I'm married and we have three children."
"Then it's logical to assume that you have a healthy sex life."
"Five nights a week!" the Climber boasted.
The man smiled a little, "Therefore it's logical to assume you don't masturbate often."
"Never!" the Climber exclaimed.
"Well there you have it" the man explained, "That's logical science at work. From finding out that you have a goldfish, I've discovered the size of your garden, all about your house, your family and your sex life!"
The Climber left, very impressed by the man's talents. On returning to the bar the Groundie asked, "I see that smart bloke was in there, did you find out what he does?"
"Yeah," replied the first, "He's a logical scientist."
"A what?" the puzzled Groundie asked.
"Let me explain" the Climber continued, "Do you have a goldfish at home?"
"No" replied his mate.
"Well, you're a wanker then!"