What do you need to know when AI can be a debater with a human?

Can a machine powered by artificial intelligence (AI) successfully persuade an audience in debate with a human? As this research develops, it's also a reminder of the urgent need for guidelines, if not regulations, on transparency in AI -- at the very least, so that people know whether they are interacting with a human or a machine. Project Debater is a machine-learning algorithm, meaning that it is trained on existing data. Among them is the language model called Generative Pretrained Transformer (GPT), devised by OpenAI, a company based in San Francisco, California. As AI systems become better at framing persuasive arguments, should it always be made clear whether one is engaging in discourse with a human or a machine?