Feedback (F3)

I thought this page was very clear and informative. I just have a couple of very minor comments:

- in Outcome Queries you define s and t as having known utilities and then write them as being in a set called 'unknown'. Should this set be called 'known' instead?

- you have a few places where spaces are missing after math symbols

- the incremental elicitation section could maybe do with a little more explanation. I think all the right information is contained there, but more explanation might make it easier to understand