What happens when the rulebook doesn't have the answer

Sometimes you ask a perfectly reasonable question and the rulebook simply doesn't answer it. The designer never wrote that paragraph. This page explains what the system does in that moment: it tells you, it quietly searches further, and it refuses to make things up.

Why "not in the rulebook" instead of a guess

The AI model that writes answers has read a lot of board game content during its training. It could produce a plausible-sounding ruling for almost anything. That is exactly the failure mode the system is built to prevent.

Every answer must be grounded in retrieved sources: passages from the official rulebooks for your game, and nothing else. The synthesis prompts contain explicit anti-inference rules — if the retrieved text doesn't state something, the answer may not state it either, no matter how confident the model "feels" from its general training. A plausible invented ruling is worse than no ruling, because you'd take it back to the table and play it.

So when retrieval comes back empty or ambiguous, the honest output is a gap disclosure: the answer says the rulebook doesn't cover this point, names what is covered nearby if that helps, and stops.

The silent escalation

Saying "not in the rulebook" is not the end of the process. When the first-pass answer can't be grounded in official rulebooks, the system automatically escalates to its second tier: a search across community knowledge — 591,000+ forum threads and 3.9 million posts from board game discussion platforms, including threads where designers answer rules questions directly.

Loading diagram...

There is no button to press and no follow-up question to answer. The escalation is silent: your answer just takes a few extra seconds and arrives with different citations. It works the same way on web chat and Telegram.

Edge cases and expansion interactions are the most common triggers, simply because those are the questions rulebooks most often fail to cover. How the community corpus is built and ranked is covered in Beyond the rulebook: how community knowledge works, and the two-tier design itself in The two-tier answer system.

The forum-source notice

When the final answer is built from community discussion because the official rulebooks don't cover the point, the answer says so upfront. The exact notice, in English:

Note: the available official rulebooks don't cover this point, so this answer is based on community forum sources.

The notice is translated into all 10 supported languages and appears only when it's true — a confident rulebook answer never carries it, and neither does one where community sources merely add color to a solid official ruling. If you see it, you know you're reading community consensus or a designer's forum reply, not official rule text. Community citations link to the original threads so you can read the full conversation.

Confidence is capped, not inflated

Every answer carries an internal confidence score. Two hard rules apply when sources are thin:

• An answer that discloses a gap ("the rulebook doesn't specify...") has its confidence capped at a low value, so it can never present itself as a sure ruling.
• A community-tier answer produced with zero usable sources is capped the same way.

This matters because confidence drives how the answer is framed. A capped answer reads as tentative because it is tentative. The system would rather under-promise on a genuine gap than dress up speculation as fact.

When even the community doesn't know

For some games there is nothing to escalate to: no rulebook PDF in the library yet, or no meaningful forum discussion. In that case you get a plain statement that no sources are available for the question — not a keyword suggestion, not a guess. Games with no documents at all get a fixed fallback message rather than an AI-written one, so there's nothing to hallucinate with.

Coverage is uneven and always will be: a heavily discussed game may have thousands of threads, a niche one might have forty. The system can't manufacture knowledge that no one has written down.

Questions

Can I force the deeper community search myself?

No, and you don't need to. Escalation triggers automatically whenever the rulebook answer isn't grounded or confidence is low. If your answer came back rulebook-only, the system judged the official sources sufficient.

The rulebook does cover my question, but the answer said it doesn't. What now?

That's a retrieval miss, not a content gap — usually caused by unusual terminology or a rule buried in an image-only page. Rephrase using the rulebook's own terms, and see I got the wrong answer — why? for the full debugging guide.

Is a designer's forum post treated as official?

It's treated as high-value evidence, clearly cited as a community source. If it ever conflicts with the printed rulebook, the rulebook wins and the answer notes the discrepancy.