KE9: Find the Real Change Between Two Rule Versions

Compare KE9 rule wording through three fictional revisions, then recalculate which lesson records qualify when caps, deadlines and eligible items change.

A revised rules page may look longer without changing much, or change one small number with a large effect. The useful comparison is not how many words moved. It is which condition changed for the reader's action. For KE9 readers examining revisions, we compare three invented clauses and apply both editions to the same records. We keep the editions separate so that no one accidentally creates a more favourable rule by combining old and new fragments.

Three clauses with different effects

The paper event has an old edition V1 and a replacement edition V2. Both apply to the same learning exercise, with V2 explicitly taking effect before the records we examine. V1 accepts up to two qualifying lesson completions; V2 accepts up to three. The cap has increased by one. This tells us the maximum count permitted, not the number of qualifying completions that a participant actually has. A higher cap cannot create an eligible record on its own.

The second clause changes the cutoff from before 20:00 IST to before 19:30 IST on 20 October 2026. That reduces the available period by thirty minutes. Retain the date and timezone as part of the clause; comparing only “eight” and “seven-thirty” would lose essential context. A completion at 19:40 is before the old cutoff and after the new one. This is a substantive timing change even if the sentence's surrounding wording stays identical.

The third clause changes the eligible range from lessons one through four to lessons one through three. Lesson four is removed; the first three remain included. Saying “the lesson list was updated” would hide the actual effect. Name the removed item and the unchanged items. An item-range change answers which completions can count, while the cap answers how many of those eligible completions can be accepted. Those two conditions must be applied together rather than compared as competing totals.

The unchanged rule in both editions is that qualifying completions count in submission-time order until the cap is reached. This clause matters for the worked case, so preserve it alongside the changes. A revision comparison should identify what stayed fixed when that fixed condition affects interpretation. It should not turn into a catalogue of every formatting alteration. Changing a heading from “Eligible lessons” to “Lessons included,” for example, need not change the eligible range if the listed items remain the same.

Apply each complete edition

Our fictional records are lesson four at 19:10, lesson two at 19:20 and lesson three at 19:40. Under V1, all three are eligible lesson numbers and occur before 20:00. The first two in time are accepted because the cap is two. The result is two counted completions: lessons four and two. Lesson three is a qualifying completion beyond the cap, not a late completion under that edition. The reason for exclusion matters when explaining the result.

Under V2, lesson four is outside the eligible range and lesson three is after 19:30. Only lesson two at 19:20 remains eligible. Its count is one, despite the new cap of three. For KE9 revision discussions, this is the key contrast: one condition became more permissive, but two others became narrower. Reading only the increased cap would lead someone to expect three accepted records from a set that contains only one qualifying record under the new edition.

Do not construct a third edition

Do not borrow V1's later cutoff and wider lesson list while also claiming V2's cap of three. That combination never existed in our paper rules. It would count all three records by constructing a third, invented edition. If a transition notice says certain earlier actions retain old conditions, apply that exception to the stated actions. Our example explicitly puts every record after V2 takes effect, so no such exception is available to change the result.

A clear change note could say: “Cap two to three; cutoff 20:00 to 19:30 IST; eligible lessons 1–4 to 1–3.” Each phrase identifies a field and its before-and-after value. Another reader can reproduce the calculation from that note and the unchanged ordering rule. A vague comment that the new rules are “better” or “stricter” would be less useful because the three fields move in different directions and affect different records.

Our KE9 comparison ends with a result that initially looks surprising: the larger cap produces a smaller accepted count for these records. There is no contradiction. V1 counts two, V2 counts one, because eligibility and timing are evaluated before the maximum is applied. A good revision reading preserves the whole applicable edition and explains the concrete effect of each changed clause. The number of revised words is secondary to the conditions those words actually alter.