The reason for focusing on explicit recognition is the assumption that the previously
learned patterns are often no longer available. It is unrealistic to assume that we will always
be able to refresh our memories through re-presentation of old patterns. It is not good
enough for a creature that has to survive in a harsh environment to be capable of rapidly
relearning old associations, as long as they are presented to it again. Old patterns must be
able to be remembered without refresh from the environment. The pseudo-recurrent memory
model presented here will attempt to indicate one way in which this might be achieved