Smartly Jokes

Two builders 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 builder.
"Looks more like a stockbroker to me." argued the second. They continued to debate the subject for a good while until eventually the first builder 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 builder said to the man.
Smiling the man replied, "I'm a logical scientist."
"A what?" asked the builder.
"Let me explain" the man continued, "Do you have a goldfish at home?"
A bit puzzled, but intrigued the builder decided to play along, "Yes, I do as it more...