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It seems like the most obvious thing in the world: if you do more cancer screening, you’ll catch tumours early and people will be better off. Former Top Gear presenter and current farmer Jeremy Clarkson recently went viral for saying exactly this about prostate cancer—in fact, he said you should lie to your doctor just to get the test.

But it’s not quite as straightforward. In this paid-only episode, we look at how strong the evidence is for universal screening for prostate cancer, breast cancer, and more. Oh, and guess what? Tom takes the opportunity to talk about Bayesianism again.