The union represents about 1,500 custodians, cooks, groundskeepers and other service workers at the five campuses, including the University of Minnesota Duluth.
In July, edible cannabis products became legal in the state, but the legislation that opened up that door had minimal regulation and no taxation requirements.
The robots can remember faces and names, use health data from sensors that patients can wear, they can even sense facial cues to react in ways that could help those who become agitated or confused as the daylight wanes.