Ritchie's death reported twice? He above all people could appreciate an "off by 1" error.

Good question. According to their FAQ at http://what3words.com/faq/#tog... "Most postal or address systems only work in 2D (e.g. ZIP codes or postal codes in the UK). These always need additional information to specify height: e.g. Flat 6, 5th floor, 12 Lonsdale Road. With what3words, we recommend a similar approach, e.g. Flat 6, 5th floor, jelly.translated.sadly" That kinda makes sense. If you knew the elevation was 20 meters, is that 4th or 5th floor? So adding text to the address is a good solution.