[tim333]

The term singularity has always been used somewhat poetically rather than in a mathematically defined way. But if you consider <stuff produced>/<human labour hours needed> it may have a singularity when no human labour is needed because the robots can do it all.

That should happen at some finite time and be a major change in things. I'd kinda expect it before Kurzweil's sigularity date of 2045. Vinge's date of 2023 was too early.