No equilibrium point
Pm=monitoring
1-        pm=not monitoring
Slacking=pm(-1)+(1-pm)(+1)=1-2pm
Not=pm(+1)+(1-pm)(-1)=2pm-1
F pm≥1/2,not slack
F pm≤1/2,slack

Ps=slacking
Monitoring=2ps-1
Not momtoring=1-2ps
F ps≥1/2,monitor
F ps≤1/2,not montor