Why does a group need a “premise”? What does that even mean?
Maybe you should just come to PS to find out what it is. It’s really not that hard. If you find that the mission/goals of PS are a bit undeveloped, then you’re just repeating what Joshua and others have discussed openly. If you honestly can’t understand the mission as written so far, then the problem is not with PS.
I think there’s plenty of hope for you. You have now realized that you had PS completely wrong. So you can come anew to discover what it is.