Forgetting is failure to retrieve information from long term memory store. Much of the information is lost but enough remains, so that we have sketchy record of our lives. Sometimes what we think is forgotten in real sense is not forgotten because it was never encoded and stored in the first place. Many students complain that they do not remember the contents after attending the class or forget after reading .the text. This happens due to lack of attention, some information does not reach short term memory from the sensory register or due to inadequate encoding and rehearsal, the information may not have been transferred from short term to long term memory. Information was not stored in long term memory because rehearsal was not sufficiently elaborate. Many times we forget as memory does not match events which had occurred. This happens due to the constructive processes i.e. during encoding, the to-be-remembered information, especially if it is a complex life event or something you have read, is modified. Certain details are accentuated, the material may be simplified, or it may be changed in many other ways so that what is encoded and stored is far from a literal copy of the input. Constructive processes of encoding distorts which stored in the memory .and distortions are remembered. We remember the gist, or meaning of what we have read or heard, but not the actual words themselves. Inferences constructed at the time the information was encoded for storage is remembered, or portions of encoded informations are remembered.