JFP revisions: move arbitrary updates over to lambdaLVar
See my notes on the reviews for some of the justification for this change.
I think it actually won't be that much work to update the existing lambdaLVar determinism proof to accommodate arbitrary update operations. In fact, I don't think there's even any more proving to do; it's just a matter of rearranging things I've already written. Famous last words, maybe...
WIP in the 'generalized-updates' branch.
I'm also gonna bite the bullet and change "lattices" to "posets". It needs to happen. Lattices are just a distraction now that updates don't have to be lubs.
Ok, sounds good! We will sign a pledge to use posets in any future papers in this area ;-).