第九十二条 公安机关办理治安案件，有权向有关单位和个人收集、调取证据。有关单位和个人应当如实提供证据。
Agar plates with E.coli growth on various concoctions, including MacConkey, Mueller-Hinton, and Brain Heart Infusion. Credit: HansN.
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Ранее в феврале в подмосковном Подольске подъезд жилого дома залило кипятком после того, как в здании обрушилась крыша.
What I found is that written evidence for knocking on wood (and for the history of gesture as a whole) is remarkably sparse. In the Penguin Guide to Superstitions, folklorist Steve Roud offers a skeptical take on the provenance of knocking on wood due to the near total absence of written records about it: