As I'm sure you know, the law clearly states that all patients are to be deemed competent in the absence of absolute evidence to the contrary. So any indecision or close-to-the-wire patients have to be assumed to be competent. Having said that, I doubt your patient was competent, according to the law anyway, in that I'll bet that while they could repeat what you've said to them, they didn't believe it. If you can demonstrate that that was the case, then yes, by all means, take them to hospital. Just don't EVER lie, deceieve or trick someone. Patients are vulnerable, especially in emergency situations, and lies breed contempt when you are discovered, and mean that this patient is going to be less likely to trust a healthcare professional in the future. And then how would you go about saving their life?