Newslink: Here It Is, the Knife Robot
When you are teaching a robot, you could pretty much start with anything. So why not start by teaching the robot to pick up a knife? Depending on how terrified of a Skynet future you are, there are more than a few reasons to not. But that did not stop the researchers at the Human Robot Interaction Laboratory at Tufts from starting right there.
https://www.popularmechanics.com/technology/robots/a22760202/knife-robot-hri-labs/