Card players have to “know when to hold ‘em, know when to fold ‘em,” as singer Kenny Rogers put it in his signature version of “The Gambler”. But that might not be enough if you are across a virtual table from an artificial intelligence (AI) poker shark, as some bots “have already learned how to deceive humans,” according to research published in the science journal Patterns Some AI systems “demonstrated the ability to bluff in a game of Texas hold ‘em poker against professional human players,” the team found. But the poker-faced chatbots were not even the canniest encountered by the researche…