One afternoon, Pat met Mick, whom he hadn't seen for quite some time. After chatting for a while, Pat asked Mick what he was doing with himself at the moment. Mick told Pat that he was studying at University College in Dublin.

"And what" asked Pat, "be you studying?"

"Logic," replied Mick.

"What's Logic?" Pat wanted to know.

"Well!" said Mick, "Do you have a goldfish?" Pat: "I do!"

Mick: "So, you probably have the fish for your kid?!" Pat: "That's right!"

Mick: "So... Having kids means your probably married!" Pat: "That's right!"

Mick: "So being married means you're not a homosexual!" Pat: "That's right!"

Mick explains that it was Logic that allowed him to figure all that out. The boys say goodbye and head off in different directions.

An hour later, Pat meets his mate Seamus. After a while Seamus asked Pat had he seen Mick around. Pat explains that he met Mick only an hour ago. Shamey says, "And what's old Mick doing with himself?" Pat replies "He's studying Logic at the University."

Seamus: "And what's Logic?"

Pat: "Let me explain....Do you have a goldfish?"

Seamus: "I do!"

Pat: "So you're not a homosexual then!"