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From our birth to today, sure has a lot of things that we see, we hear, and we taste. All the things that accompany every step of our lives until later on, either when, which we refer to as a word that is memorable. Many of the stories are stored in our memory, there is that we use as a motivator in our activities, there is also that we hide meetings and couldn't help us remember more as a dark story of our past.

But of all those events are all we can remember? of course the answer is no, just some of the events that got more attention than we are able to we remember our first Value such as report cards, When we angried with our parents, our brother or same angry stories that got more attention from us. Continue to where other events we save?, even though in theory it is said that every thing or event in our memory and has already lasted for 30 seconds and above already go to the LTM (Long Term Memory).

From what I can from my friend's explanation, he said that there was some type of forgetfulness, maybe I'll just write down what I remember (though not all), there is an encoding failure, Amnesia, Decay, Interference, deliberate forgetfulness, and Repression, let's discuss alike.

In theory the first explained that forgetfulness could occur due to failure of the encoding, knowing of the password? your password is the means of encoding failure code is failure include code into LTM. for example just like this, just maybe we've upset (slightly) when someone we know it even says that he does not know us, of course it would not necessarily be so guilty, because in theory this memory failure, explained that the meaning became one of the main reasons we so get on forgetting concluded that the forgetfulness that person to us the reason could have been the "name" because we are not meaningful for him so that information about us is not entered into the person's or LTM term cool are we not important to him or her more "young" again "we wrote that to his GR-20s". and the second reason in this memory failure is due to stress.

A second theory about this is forgotten due to Amnesia, forgetfulness are amnesia because of disease or because someone suffered an injury to the experienced, there are two types of amnesia retrograde Amnesia is the first and the second is anterograde amnesia, retrograde Amnesia is losing our memory of things that happened before the injuries while anterograde memory loss is us against the things that happened after injuries. retrograde and anterograde amnesia is more common than total anterograde.

Whereas the third theory is a theory of decay, that is the theory that says that our memory fades with time flow naturally because it is rarely used for example is our forgetfulness of our lesson materials such as the PKN lesson SD fitting of course many have forgotten, it is not because we do not give our attention when studying the material will but because such material rarely we use in our learning processes furthermore.

A fourth theory is a theory of interference, which is mixing between one memory with the memory of the others that are similar. There are two kinds of mixing that occurs the first is retroactive interference i.e. a theory which States that there is a new memory that inhibit the emergence of long memory. for example, when used in high school we had a friend who's very familiar and we are memorized with the number Hand phone but after we got into our University got a new friend so we very memorized with number Hand phone as well so we when asked about mobile phone number of our friends who are HIGH SCHOOL SENIORS we can't remember it. whereas the second is proactive interference i.e. allied memory so that the new memory is deleted by the old memory, in fact in this case is the effect of a habit that we have done over and over again so that when we do a similar thing with there little change, whether it's a place, thing or the time we tend to give the same response relative to what we were doing over and over again.

the next is a deliberate forgetfulness, i.e. a person who removes a trauma or incident that sad, creepy or other negative things so they won't remember the things that he had experienced, for example someone who is affected, think of the kidnapping, they tend to forget, refused, and ordered himself not to mind. the last is the repression of the memory pressing method unconsciously because masses of things