ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins81% CONFIDENCEOverall confidence: 81%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Wikipedia[1] gives the year only - Waters "opened Chez Panisse in 1971 with the film producer Paul Aratow" - so the pin sits on that year's last day.Alice Waters opened Chez Panisse in 1971 with the film producer Paul Aratow, in a house on Shattuck Avenue, and in doing so more or less founded what came to be called California cuisine: a short menu set by what the farms around the bay had that week rather than by a fixed carte. The block it stands on is now known as the Gourmet Ghetto.