Pseudoscience

The prefix 'pseudo-' in pseudoscience means 'seemingly similar, but actually different.' Pseudoscience refers to claims that borrow the authority and outward appearance of science—specialized academic terminology, complex graphs, and laboratory-like settings—but do not actually follow scientific testing procedures. In everyday language, it is also called pseudo-science or false science.

The important point is that it concerns the approach, not the subject matter. Any field can be a subject of science if it is approached in a testable way; if it is approached in a way that evades testing, it takes on the characteristics of pseudoscience. Pseudoscience is also distinct from 'science that contains mistakes.' Even studies with inadequate designs or incorrect results can have their errors corrected later within the scientific method. Pseudoscience differs in that the path to correcting its own errors is itself closed off.

In philosophy, the challenge of drawing a clear boundary between science and non-science is called the demarcation problem. No single criterion fits every situation perfectly, but several key criteria are commonly used to make this judgment.

• Falsifiability — A criterion emphasized by the philosopher Karl Popper. It must be possible to answer the question, "What observation would lead you to acknowledge that this claim is wrong?" If a claim is defended as correct regardless of the result, there is no way to test whether it is true.
• Controlled testing — This asks whether a claim has been tested using a comparison group and methods that reduce bias, rather than relying on personal testimonials or subjective impressions. Control-group designs that compare an intervention with a placebo (Randomized controlled trial, Blinding) are typical examples.
• Self-correction — This asks whether existing claims are revised when new findings emerge, or whether the same claims are maintained regardless of the results.
• Reproducibility — This asks whether other researchers consistently obtain the same results when repeating an experiment using the same methods.

In his book *The Demon-Haunted World* (1995), astronomer Carl Sagan introduced these checks as a 'baloney detection kit.' They involve asking whether other researchers have independently checked the findings and whether the evidence presented is commensurate with the magnitude of the claim.

• Explanations rely on terms with vaguely defined meanings. Typical examples include unmeasurable 'energy,' 'vibrations,' or 'toxins.'
• Claims rely on authority, tradition, or personal testimonials rather than evidence.
• Results that contradict the claim are ignored or dismissed as mere 'exceptions.'
• Requests for verification are rejected, or explanations are continually changed to make testing impossible.
• Every problem is explained by a single cause.

One of these signs alone is not enough to immediately label something pseudoscience. Consider whether several signs occur together and how proponents respond to requests for testing.

Phrenology. This hypothesis was popularized in the early 19th century by the German-born physician Franz Joseph Gall. It claimed that bumps on the skull revealed personality and innate talents. It appeared scientific because the skull's external shape could be measured directly, but cases that did not fit the hypothesis were sidestepped by adding further explanations. Over time, as research identifying the actual localization of brain functions accumulated, phrenology lost its academic validity.

Blood type personality theory. The idea of classifying personality types by blood type often comes up in everyday conversation. However, studies that examined personality assessments alongside blood types have not found a meaningful association. Even so, people can easily feel that it 'seems accurate' because of the Barnum effect: the tendency to interpret vague descriptions that could apply to anyone as uniquely describing oneself.

Gastroptosis is an older term describing the stomach as sitting lower than its normal position, and it provides a useful example for developing the ability to distinguish pseudoscientific claims. The concept of 'ptosis,' or organs sagging downward, became widespread through the theory of enteroptosis proposed by the French physician Frantz Glénard in the late 19th century. The hypothesis held that weakening of the abdominal wall and internal supporting structures allowed organs to sag, which could explain not only digestive symptoms but also systemic conditions such as neurasthenia and fatigue. This idea permeated health discourse, gymnastics, and postural exercises in the early 20th century, reached Korea through Japan, and remains part of everyday language today.

This account is useful as an example because even within a single claim, the degree of verification differs from one link in the chain to another. The chain usually runs as follows: abdominal supporting tissues weaken → the stomach moves downward → digestion slows → bloating and fatigue develop. The validity of each link can be examined separately.

• The position and shape of the stomach vary from person to person. They also vary with body build, posture, and whether a person has eaten. The stomach is loosely suspended by ligaments and the peritoneum, and its volume increases with the amount of its contents, so its lower border is not a fixed line to begin with. This link is an anatomically established fact.
• Digestive symptoms such as bloating really are common. The symptoms people feel are real experiences.
• Whether the 'lowered position' causes those symptoms is a separate question. Many people whose stomach sits low on imaging have no discomfort, and the reverse is also common. As Asymptomatic imaging findings illustrates, what is visible does not always match what a person feels.

Defining the condition solely by body build ("If you are thin, it is gastroptosis; if your belly protrudes, it is gastroptosis") makes the claim correct regardless of the outcome, so it is also a useful example to examine against the criterion of falsifiability.

Saying that a particular claim has pseudoscientific characteristics does not mean that the person who experienced it is lying. Physical relaxation, touch, psychological expectations, and natural improvement over time can all produce genuinely positive changes. The problem arises when claims about the underlying mechanism go beyond what has been verified. Conversely, the fact that something has not yet been adequately verified does not mean it is 'wrong forever.' Something that has not been verified is different from something that has been shown to be wrong.

1. If this claim were wrong, what observations would reveal the error? 2. Has it been tested in a study with a comparison group? How did that study reduce Bias? 3. Have other researchers reproduced the same results? Is there a Meta-analysis that brings together multiple studies? 4. Does the explanation distinguish where it starts from established facts (anatomy and physiology) and where it shifts into assumptions? 5. Has the claim been revised as new research findings have emerged?