AI recreations of real people, which clone their faces, distinctive voices and all, have become so convincing that even top computer specialists are finding it hard to tell the difference between fakery and reality. Creative "deep fakes" aren't all bad - they can bring dead artists and historical figures alive, to energize museums and schools - but most uses so far have been evil: Think fake pornographic videos of your sister or daughter, or scams that bilk people out of millions of dollars. Our guest, law professor Danielle Citron at the University of Virginia, has been advising companies and government officials on how to protect the public from the terrible harm that deep fakes can cause, but executives like Elon Musk don't want to listen. Her worst fears haven't come true yet - such as a deep fake that changes an election or triggers a war - but it's hard not to expect them.

Dazzle friends with the grammar smarts you'll get from our second chat with Bryan Garner, one of America's language gurus. Finally, you're about to learn if you can - or cannot - end a sentence with a preposition; if you can use "like" instead of "as"; and if you can banish "whom" and "whomever" from your brain. Just wait until you hear Bryan's rant about lawyers' terrible writing. Speaking of which, can you guess which common five-letter word (which lawyers love) causes endless legal battles?

... we've never had so much fun debating it! Bryan Garner, one of America's grammar gurus, tells us where we're going wrong grammatically - and what we're getting right. You're sure to find (you'll surely find?) answers to some of your own burning questions, like (or is it "such as"?): should you feel bad about using adverbs? Or should you feel badly? How will this episode impact your own language? (Actually, is "impact" even a verb?) After hearing our conversation with Bryan, you might not write or speak quite the same way.