Subsequent reading of the memory cell indicating that {HEAD ~ the threshold voltage} of the memory cell is in {TAIL ~ a forbidden zone} indicates that the threshold voltage of the memory cell has changed and is in error 
Subsequent reading of the memory cell indicating that { HEAD ~ the threshold voltage } of the memory cell is in { TAIL ~ a forbidden zone } indicates that the threshold voltage of the memory cell has changed and is in error
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH