The second difference is that while historical narratives are "blanket" narratives - psychology is "tailored", "customized". A unique narrative is invented for every listener (patient, client) and he is incorporated in it as the main hero (or anti-hero). This flexible "production line" seems to be the result of an age of increasing individualism. True, the "language units" (large chunks of denotates and connotates) are one and the same for every "user". In psychoanalysis, the therapist is likely to always employ the tripartite structure (Id, Ego, Superego). But these are language elements and need not be confused with the plots. Each client, each person, and his own, unique, irreplicable, plot.

To qualify as a "psychological" plot, it must be:

1. All-inclusive (anamnetic) - It must encompass, integrate and incorporate all the facts known about the protagonist.
2. Coherent - It must be chronological, structured and causal.
3. Consistent - Self-consistent (its subplots cannot contradict one another or go against the grain of the main plot) and consistent with the observed phenomena (both those related to the protagonist and those pertaining to the rest of the universe).
4. Logically compatible - It must not violate the laws of logic both internally (the plot must abide by some internally imposed logic) and externally (the Aristotelian logic which is applicable to the observable world).
5. Insightful (diagnostic) - It must inspire in the client a sense of awe and astonishment which is the result of seeing something familiar in a new light or the result of seeing a pattern emerging out of a big body of data. The insights must be the logical conclusion of the logic, the language and of the development of the plot.
6. Aesthetic - The plot must be both plausible and "right", beautiful, not cumbersome, not awkward, not discontinuous, smooth and so on.
7. Parsimonious - The plot must employ the minimum numbers of assumptions and entities in order to satisfy all the above conditions.
8. Explanatory - The plot must explain the behaviour of other characters in the plot, the hero's decisions and behaviour, why events developed the way that they did.
9. Predictive (prognostic) - The plot must possess the ability to predict future events, the future behaviour of the hero and of other meaningful figures and the inner emotional and cognitive dynamics.
10. Therapeutic - With the power to induce change (whether it is for the better, is a matter of contemporary value judgements and fashions).
11. Imposing - The plot must be regarded by the client as the preferable organizing principle of his life's events and the torch to guide him in the darkness to come.
12. Elastic - The plot must possess the intrinsic abilities to self organize, reorganize, give room to emerging order, accommodate new data comfortably, avoid rigidity in its modes of reaction to attacks from within and from without.

In all these respects, a psychological plot is a theory in disguise. Scientific theories should satisfy most of the same conditions. But the equation is flawed. The important elements of testability, verifiability, refutability, falsifiability, and repeatability - are all missing. No experiment could be designed to test the statements within the plot, to establish their truth-value and, thus, to convert them to theorems.

There are four reasons to account for this shortcoming:

1. Ethical - Experiments would have to be conducted, involving the hero and other humans. To achieve the necessary result, the subjects will have to be ignorant of the reasons for the experiments and their aims. Sometimes even the very performance of an experiment will have to remain a secret (double blind experiments). Some experiments may involve unpleasant experiences. This is ethically unacceptable.
2. The Psychological Uncertainty Principle - The current position of a human subject can be fully known. But both treatment and experimentation influence the subject and void this knowledge. The very processes of measurement and observation influence the subject and change him.
3. Uniqueness - Psychological experiments are, therefore, bound to be unique, unrepeatable, cannot be replicated elsewhere and at other times even if they deal with the SAME subjects. The subjects are never the same due to the psychological uncertainty principle. Repeating the experiments with other subjects adversely affects the scientific value of the results.
4. The undergeneration of testable hypotheses - Psychology does not generate a sufficient number of hypotheses, which can be subjected to scientific testing. This has to do with the fabulous (=storytelling) nature of psychology. In a way, psychology has affinity with some private languages. It is a form of art and, as such, is self-sufficient. If structural, internal constraints and requirements are met - a statement is deemed true even if it does not satisfy external scientific requirements.