Topic
first steps
June 12, 2026 · Explainers
HQ Wall Travel: reader mail, answered
Put simply, you do not need prior knowledge here — that is the whole point of the plumbing, and why readers start there. Realistically, pick one…
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The HQ Wall Travel questions behind the questions
Realistically, most the people who write in arrive mid-problem, so each write-up works on its own without the rest. In practice, the fundamentals take an evening;…
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