There's no possible way that you would ever get to 90 10 and really defend. Oh, yes, it's definitely 90% green. That makes no sense. David Albert's objection is not that it should be 90 10 rather than 50 50. His objection is that you shouldn't assign probabilities at all. You should just remain silent. This is something about which we cannot speak, so we should just remain silence about it. I think that that's not a good way to go through life. We feel comfortable in situations where what we mean by probability is some borrowed version of a frequency. When you're flipping coins or playing dice or playing cards, then you can really imagine doing the experiment