Gunnar suggested: >I'd always heard that it was "How many angels can balance on the head >of a pin?" I remember it as angels dancing on the head of a pin - well they would, wouldn't they? Just try standing on one. If this discussion reminds Lubomir of angel/devil pin debates then that might be because we tend to forget the original question in our enthusiasm for The Truth. I understood the problem as identifying research directions if you take the concept of Timeless as your starting point. It does not really matter whether the version of Timeless you use is pure as long as it takes you somewhere productive. Later on, of course, you will have to be scrupulous about your definitions and (reasonably) precise about your intentions. Best wishes from Sheffield Chris Rust