Either behavior is self-reinforcing from one year to the next.
Two behaviors are self-reinforcing every year.
None of the behaviors are self-reinforcing.
A group of people sitting around a coffee table with beer bottles.
The truck is in the garage.
Also, one day to the next.
A woman is knitting.
An onlooker is sitting.
She probably wouldn't like the nursing home but the stroke took care of that.