Sharply Jokes

Two guys are sitting in a quiet, rundown bar, when a man, dressed very sharply in a dark suit and carrying a briefcase, walks in. The two guys are surprised to see such a man in their local bar.
"He looks like a lawyer to me," the first guy says.
"No, I'd say an accountant," his friend replies.
After bickering back and forth, the first man decides to go over to the sharply dressed stranger to settle the debate.
"Pardon me," he says, "but my friend and I were having a disagreement over there and were wondering if you could help. Tell me, are you a lawyer or an accountant?"
"I'm neither a lawyer nor an accountant," replies the stranger. "I'm actually a reasonable scientist."
"What the hell is a reasonable scientist?" cries the man.
"Well, allow me to give you a demonstration. Do you have any goldfish?" asks the stranger.
The man nods.
"Well then, if you have goldfish more...