Probability problems of Dobrushin type

I review five probability problem areas which I believe are in the spirit of my friend, Roland. Were he still around, he would shed light on them in his inimitable, insightful way. The novelty of this note is that it ties together a lot of my special papers in a way that perhaps only Roland would grasp; even though I cannot see the commonality. Anyone who wants to comment is more than welcome to do so: shepp@stat.rutgers.edu