Hic Sunt Dracones; Why Your Map Will Never Be Finished
Somewhere around 1510 what is now known as the Lenox Globe was made. Apart from being either the second or third oldest globe in existence, the Lenox Globe is infamous for the first appearance of the Latin Phrase HIC SVNT DRACONES, which is today loosely translated as here be dragons. This is probably not a reference to the precise location of dragons, but is thought to be a reference to the Kingdom of Dragoian in Sumatra which was noted by Marco Polo during his travels. Nowadays the phrase is commonly taken to mean "here is stuff we don't know about or which hasn't happened yet".
All of which reminds me of a conversation I had with a member of the finance team in a previous job; the company name is redacted to prevent embarrassment. The conversation went something like this ... "So, when will this map of yours be finished?" "It won't; the world is always changing". "Well I need a date for reporting against, so can I say the map will be finished at the end of the financial year?"