UDT does not propagate ignorance. Instead of using evidence to build knowledge of a single universe, it uses that evidence to identify what effects a decision has, possibly in multiple universes.
Not quite (or maybe you mean the same thing). Observations construct new agents that are able to affect different places in the environment than the original agent. Observations don’t constitute new knowledge, they constitute a change in the decision problem, replacing the agent part with a modified one.
Not quite (or maybe you mean the same thing). Observations construct new agents that are able to affect different places in the environment than the original agent. Observations don’t constitute new knowledge, they constitute a change in the decision problem, replacing the agent part with a modified one.
Yes, or at least I agree your explanation.