The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
No wording about the date found on 3ders.org; treat it as unverified.
Digital Trends independently corroborates Marshall's prediction and the 2030 timeframe for fully 3D-printed superyacht construction.
Fox News independently covers the same July 2017 Superyacht Design Symposium presentation by naval architect Greg Marshall predicting fully 3D-printed superyachts by 2030, corroborating the pin's source (3ders.org[1]).
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.