Tips · 4. Advanced techniques, and what the marks mean · 27/28
Being true and being provable
Tobi’s tip
Tobi“A lucky guess… still doesn't count…!”
- the ghost is here — but unprovable
The clue-1 ghost is in one of the two yellow cells — the truth surely exists. But right now you have no way to prove which. Open on a hunch and hit, and it is true yet unproven — so the 🧠 mark dies. Being true and being provable are different things: one of the great discoveries of logic. If you want the 🧠, play only moves you can prove.
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