At the convention, Youngwriter encountered the Editor, and they fell into rapid and animated conversation in the bar. After many drinks, the Editor asked Youngwriter if he had a manuscript to show him.
"Why, yes," Youngwriter burbled happily. "I happen to have my latest novel right here in my bag, and..."
Quick as a flash, the Editor brandished a heavy stick and rapped Youngwriter three solid blows on the head. "If you have your manuscript with you at the Convention, you have no manuscript to show me," he declared, and turned his attention to the latest group of arrivals in the bar.
At that moment, Youngwriter was enlightened.