 Apparently, her degree of belief that it’s an embolism given that she has degree of belief x that it’s an embolism should be less than x, contradicting SR. Or imagine that the person who tells me a hallucinogenic drug has been slipped into my coffee is a trusted friend who is neither in the habit of joking nor currently smirking. I seem to have an obligation to regard some of my current degrees of belief as higher than they should be.