Growing the Stall Tree

One full tree-growing run on six training rows shows questions auditioning, piles splitting, and a readable theory emerging.

Audition the root on rows one through six. Weather: the sun pile reads yes-yes-no-yes — majority yes, one miss; the rain pile reads no-no — clean. One miss total. Weekend: one miss each side — two. Festival: the festival pile reads yes-yes — clean; the rest, yes-no-no-no — one miss. Festival ties weather at one; take festival. Its yes-branch is pure: leaf — sold out. The no-branch still mixes, so recurse: auditioning inside it, weekend wins; its weekday side is purely not-sold-out, and its weekend side splits perfectly on weather — sun sold out, rain not. The finished tree in words: festival means sold out; otherwise weekday means not; otherwise sun means sold out, rain not. Check all six training rows: six for six.