wherein {HEAD ~ the voltage differential} between the negative stylus voltage and {TAIL ~ ground} is greater than a threshold voltage for rotating a rotatable element in the electric writable medium, 
wherein { HEAD ~ the voltage differential } between the negative stylus voltage and { TAIL ~ ground } is greater than a threshold voltage for rotating a rotatable element in the electric writable medium ,
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH