A Harvard Business School study shows that several AI companions use various tricks to keep a conversation from ending.

What ever happened to “You’re welcome”? The beauty of that statement is that it signals the end of a conversation in a meaningful way. Unfortunately, it’s been lost in the relentless migration of ...

“Do you know what ‘ttfn’ stands for?” I whipped around to see a lanky preteen girl browsing a rack of greeting cards with a friend. “No, what’s that?” asked the friend. “Ta ta for now,” the girl said.