point of departure
Nautical. the precise location of a vessel, established in order to set a course, especially in beginning a voyage in open water.
a place to begin, as in a discussion, argument, etc.
Moot Point vs. Mute PointYou may have heard coworkers or acquaintances refer to an inconsequential or irrelevant point as a moot point, or maybe you’ve heard mute point instead. Fans of the TV show Friends may have heard a third variation: moo point (because, according to Joey, a cow’s opinion doesn’t matter). But which expression is correct, and what exactly does it mean? The correct phrase is moot point. …
Origin of point of departure
First recorded in 1855–60
Also called departure.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019