|Witold Szafraniec, Poland,
Translation from Polish:
During my recent visit to Piwniczna over Poprad, I had some time to attempt a critical assessment of the SuperMemo method. Unfortunately, I am not sure if I do not have to wage a war against a shadow. Having read the book about SuperMemo (published by SuperMemo World), I have found lots of gibberish that did not really let me truly understand what this sensational method of fast learning is really all about. This makes me wonder if the gibberish wasn't by any chance intentional (to obscure the weaknesses of the technology).
For the sake of this discussion, I will assume that the basic goal of this method is to provide a student with a tool to assist the brain in better or more effective remembering of facts or information. Everything that I write in this text is a consequence of this assumption.
I will begin with the conclusion. Firstly, I believe that the abilities of the human brain are limited, and no method of this real world can possibly increase the storage capacity of the brain. Secondly, mnemonic techniques (e.g. "cram and plough in daytime relentlessly to see seven hills pile up ...") have been known for ages and I can't see the reason why we should not continue to develop them. Thirdly, the whole idea of SuperMemo calls for bringing up the issue of the so-called erudite trap.
To explain the third point: an honest and hard-working erudite with a wish to reliably and completely explore a problem will at times arrive at an illusion that he has hit upon some original idea, which will enrich the treasure house of human wisdom. However, upon a closer scrutiny, a short search of the historic resources of the mankind will usually reveal that the same idea had much earlier been discovered by someone else. The idea then appears to be more or less an unintentional plagiarism. Ben Akiba used to say: All has occurred before! 
In human history, the mankind has come up with at least several breakthrough inventions which superbly improved our access to information. It seem obvious that these milestones were in turn: (1) the development of speech, (2) writing, (3) printed matter, and finally (4) the development of computer technologies. Please note that none of these sensational inventions went in the direction of increasing the storage capacity of the human brain.
SuperMemo method would then be the first invention that has succeeded in aggrandizement of memory. An accomplishment that defies belief! 
My remarks that follow are based on a review (by Krzysztof Szymborski) of a book entitled The New Renaissance : Computers and the Next Level of Civilization written by Douglas Robertson.
Before humans could master the language, information resources accessible to each of our ancestors were limited in principle to the volume capacity of the human brain. That, according to Robertson, would be about 10 million bits. The development of language resulted in this that we did no longer need to search for information in our heads and we could, for example, ask a friend or any other language-capable individual. According to Robertson, this improvement has increased the resources of accessible information more or less a hundred times in an average person's case.
Hand-written texts increased, in Robertson's opinion, the reserves of accessible information by another two orders of magnitude. Dissemination of the printed word in the form of mass-produced books, newspapers, manuals, etc., allowed, according to Robertson, to increase the quantity of publicly accessible information by another million times. The question of how much more information is available to us thanks to the invention of computers boggles the mind. Robertson arrived at a stunning number of 10^25 bits. Most of us (eggheads, managers and plain bread eaters) suffer from the overwhelming information fatigue syndrome. The methods that help us remember more (i.e. create SuperMemory or help us Forget about Forgetting) are precisely in opposition to that what we would expect from the world flooded with information! Our brain uses a signal transmission mechanisms that are a million times slower than those of modern computers. This is still the brain with the processor and memory available at times of Adam and Eve. To absorb new information and learn, we depend on the help of short-term memory with an astonishingly small capacity. This is a biological fact and any attempts at "increasing" this capacity remind an ancient effort of constructing the perpetuum mobile. Collecting and memorizing facts (as in SuperMemo), independent of how fast and efficient (e.g. 40 000 English words in a month), is not yet a sufficient condition of wisdom. Knowledge is rather hidden in relationships between facts. These relationships determine the sense and importance of information. A sensible perception of the reality is not possible without a general hierarchy of value (outlook) that creates an order in the chaos of information flowing in from the outside world. An outlook or hierarchy of values can help us effectively select information and eliminate the excess of facts. Nowadays, with the help of the Internet we have created a sort of a gigantic external human memory. It should be enough to create in our memory some sort of an index to this wealth of information. Instead of remembering something that is written somewhere in generally accessible (public) memory, it is enough to index it in an efficient way in human memory. Creating in memory a database from the wealth of sources is unquestionably foolish and stupid. Our brain will never be a better library of knowledge than, for example, the Internet. Even if the Robertson's or Kurzweil's predictions in reference to the evolution of the human brain come true. We should strive at a situation in which our brain becomes an index to the outside information. An index of relationships between facts and ideas. Once we want to analyze these facts, we will still need to consult the sources. The more we attempt to forget about forgetting, the less memory we have at hand in our heads for "index files". Consequently, we will suffer from more and more information smog as envisaged in David Shenk's Data Smog. Knowledge of literary classics (e.g., biblical scapegoat or La Fontaine's The Fox and the Grapes, etc.), an ordered system of values (i.e. outlook), a conviction that All has occurred before! and the awareness that we are just mere mortals should all contribute superbly to the building of the basis for an efficient and functional index to knowledge!
No force on this planet will ever convince me about the usefulness of SuperMemo. I have tried SuperMemo for some time to learn some vocabulary of English. It might work for vocabulary but ... what's the point of extending the claims into the realm of sciences, literature and arts?
I would like to wish the entire team at SuperMemo World lots of self-criticism and humility in investigating the magic powers of the human mind
Unlike the text discussed in SuperMemo is Useless, this article interestingly acknowledges the need to build an index to knowledge in human memory. However, the text fails to observe that the index is a structure that also requires memory. In the light of the omnipresent forgetfulness, the index will equally well need to be preserved with frequent use or with spaced repetition (i.e. SuperMemo)
In simple words, we need SuperMemo to quickly and efficiently build the index to knowledge
In more precise terms, the author's index to knowledge is nothing else than knowledge. Author's terminology seems to emphasize that knowledge stored in human memory should make a microscopic, yet properly selected subset of the entire knowledge available in human accessible resources (e.g. the Internet, Library of Congress, etc.).
Let us consider a simple example. A mere mortal will usually be aware that doughnuts are foods that should better be avoided by people who fear a heart disease. The fact "Doughnuts ain't good for heart" contributes to an average man's knowledge about health. This fact probably does not need SuperMemo. After all, most of us will refresh the knowledge about doughnuts and the heart each time we see a tasty doughnut. The Doughnut Fact contributes also to our index to knowledge. It is enough to jump to AltaVista and type +doughnut +heart to make a good use of this particular entry in our index. The search will help us recover more knowledge about the relationship between doughnuts and the heart
If we want to enhance our ability to think and conclude about doughnuts and the heart, we might try to remember the following:
There is an advantage to knowing the above facts and rules: upon finding out that French fries are high in trans fatty acids, we will be able to use Rule 1 and Rule 2 to derive a new fact: French fries ain't good for heart. The awareness of the above rules will increase our reasoning ability. In the terminology of knowledge engineering, we will be able to derive new facts and rules from the existing set of facts and rules. In plain language, we will know more than we have actually learned. We will be able to conclude more. We will become more intelligent (if intelligence was defined as the inferential ability of the human mind). See also: Roots of creativity and genius
Yet there is a downside to remembering the trans fat rules. They are not as plain as the Doughnut Fact, and they may not effectively be refreshed upon a sight of a doughnut. Consequently, we may simply forget the link between doughnuts, trans fat, and the heart. This is where SuperMemo comes to play a role. Naturally, it will not increase the memory capacity. It will only help you refresh the trans fat rules. It will minimize the number of reviews in lifetime. In other words, it will only help you keep the trans fat rules in your forgetful memory. Using Mr Szafraniec's terminology we could say that SuperMemo makes sure that your index to knowledge remains intact in your mind
As for Kurzweil's predictions ... one of them is that we shall be able to plug in the World Wide Web to our brains by 2019. This still does not ensure our memory of WWW is associative (i.e. we can make instant searches and association). Until we can artificially expand human associative memory ... SuperMemo still has a role to play
Witold Szafraniec's article illustrates how a minor confusion in terminology can result in drawing seriously flawed conclusions. For a concise discussion of the confusion between terms such as data, information, facts, rules and knowledge and how this confusion affects our perception of the learning process, see: It's more than just memorizing by Luis Gustavo Neves da Silva
If the knowledge of literary classics shall be the basis of our knowledge index, we should start from the basic premise and the guiding light: