This public meeting doesn't seem to be going very well ...
1. Decide on the outcome before you start.
2. Limit the conversation to the options you came up with before you launched the process.
3. Make sure that the path between the public process and the final decision is a black box.
4. Rely on outside experts without those experts ever earning the trust of the community.
5. Assume that the participants in your process are stupid.
