An even bigger problem is expressing estimate stability -- the difference between "50% confidence the coin will land heads, because I'm very confident it is a fair coin" and "50% confidence the coin will land heads, because I know the coin is either two-headed or two-tailed, but I have no information about which one". Whereas confidence levels at least have vague language, like "very unlikely" or "somewhat likely", estimate stability doesn't, except for even more useless phrases like "but I could very well be wrong" or "but that may change as we find out new information".