Core tier · about 6 hours · 6 parts
Part 3 of 6 · 2 min read
Results and how to use them Covers: Results over 5 worlds (30 questions, k = 3).
Policy
Correct
Answer retrieved
Stale value also retrieved
Plain fact
Revised fact
Constraint
recency only
0%
0%
0%
0%
0%
0%
similarity only
43%
73%
30%
80%
0%
100%
blended score
60%
90%
30%
90%
27%
100%
blended + supersession
90% 90%
0% 90%
87%
100%
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Questions answered correctly with k = 3 (5 worlds x 6 questions) recency only 0% stale value also retrieved on 0% of questions similarity only 43% stale value also retrieved on 30% of questions blended score 60% stale value also retrieved on 30% of questions blended + supersession 90% stale value also retrieved on 0% of questions Raising k does not remove a stale value; it only adds more neighbours. k = 1: sim 67% / sup 77% 2: sim 43% / sup 83% 3: sim 43% / sup 90% 5: sim 53% / sup 97% 8: sim 57% / sup 100% (sim = similarity only, sup = blended + supersession) Retrieval chooses among stored items; it cannot tell which of two similar items is current. Correct answers by policy at k = 3, and the effect of k. Stale values are retrieved by any policy that does not supersede. Reading it:
Similarity finds the important constraint (100 percent) because the question matches its concepts, even though it is 59 days old. Recency never can.Similarity fails every question about a revised fact (0 percent) : both values are retrieved, so the stale value is always present. "Correct" requires the answer present and no stale value.The blend helps plain facts (80 to 90 percent) by preferring recent copies, but still fails most revised facts (27 percent).Supersession is the only change that fixes revised facts (87 percent). The remaining misses are plain retrieval misses: a chatty note outranked the fact.
Recency weight. With supersession on, recency weight 0 gives 93 percent, 0.3 gives 90, 1.0 gives 53 and 3.0 gives 10. Once old values are removed at write time, recency is nearly redundant, and a strong recency weight buries the important old facts under new chatter. This is why I would treat recency as a tie-breaker, not a driver.