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.
The topping out is dated: Wikipedia[2] records the south tower's final slab poured on 24 July 2015, completing its 67 floors and full 216 m as Colombia's tallest building. The north tower's last slab followed on 20 December 2015 and structural work finished on 24 February 2016; the pin's old end-of-2016 date matched none of these. The opening itself kept slipping for years afterwards.
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.
