Differential diagnosis and mental illness

Area of Science:

• Philosophy of Medicine
• Medical Ethics
• Philosophy of Psychiatry

Background:

• Thomas Szasz famously argued that "mental illness" is a metaphor, not a literal disease.
• His work challenges the medical model of psychiatric disorders, emphasizing personal responsibility and societal control.
• The debate questions the objective classification of mental health conditions versus subjective moral judgments.

Purpose of the Study:

• To critically analyze Thomas Szasz's argument that mental illness does not exist.
• To examine the role of moral valuations and autonomy in the assessment of disease, particularly in psychiatric contexts.
• To evaluate the logical coherence and evidential support for Szasz's conclusions.

Main Methods:

• Close reading and philosophical analysis of Thomas Szasz's arguments regarding mental illness.
• Examination of Szasz's views on differential diagnosis and its relation to behavior.
• Analysis of how concepts like autonomy influence the definition and assessment of disease.

Main Results:

• Szasz's argument, despite claims of value-neutrality, inherently incorporates moral valuations in disease assessment.
• Behavior serves as the basis for differential diagnosis, linking observable actions to the classification of anatomical deviations as diseases.
• Szasz's emphasis on autonomy introduces his own moral framework into the concept of disease, challenging its objective standing.

Conclusions:

• The analysis does not disprove Szasz's conclusions about the non-existence of mental illness.
• However, Szasz's argument is found to be insufficiently supported to bear the weight of its radical conclusion.
• Moral assumptions are shown to be inseparable from the assessment of disease, even within Szasz's framework.