alt Hacker NewsI would assume it depends on what you are distilling.
If you are making brandy from clarified wine, it probably separates better than rotten grape mash.
It is still a continuum with some methanol molecules likely remaining even in the tails.
For all intents and purposes, the distiller's rule of thumb of throwing away the angels' share is still going to work because low methanol concentrations are never an issue —for the antidote for methanol is ethanol.
You throw away the foreshots because they also contain things like acetone that taste bad and may be harmful. They’re highly unpalatable so people can be relied on to do a sufficient job.