This read-only TruthValue indicates whether this particular statistics sample only covers part of its expected collection interval, rather than a complete one. This warns an admin not to directly compare a partial sample's value against full-interval samples when calculating rates, since it would understate traffic. For example, a sample flagged as partial right after a device reboot mid-interval tells the admin that sample's counter value reflects less than the full collection period and shouldn't be averaged the same way as complete samples.