Apple says too many faces ruined its Face ID stage demo
 

When Apple OS chief Craig Federighi tried to demo Face ID on stage during Cupertini's annual iPhone event, it didn't quite work as he expected. "Your passcode is required to enable Face ID" popped up, eliciting a nervous chuckle out of Craig and forc...

https://www.engadget.com/2017/09/14/...-face-id-fail/