Reducing TTL to 8 rounds
Removing debug output
Bound user interest, completion factor; Don't decay completion factor
Try for > 0 utility, settle for >= 0 utility
Less weight for prior / rating and similarity
Quadratic decay for influence
Constraint statements with superseeding relationships now override e.o.
Superseeding logic for new relationship types
Give boolean value mismatch less weight ([-0.5,0.5] instead of [-1,1])
Scale distance output for eq / neq / gt / lt

Scale by remaining attribute space [attribute,$extreme] (where $extreme
is either lowest or largest bound, depending on the comparison
attribute)
Stack for last recommendations (for proper undo -> similarty)
"At least" etc. are now >=, not >
Completion factor of unspecified attributes is 1
Logging