Diagnosticity is the degree to which a piece of evidence or test outcome discriminates between two or more competing hypotheses. Parameters: (1) a set of hypotheses to discriminate among; (2) an observation or test result; (3) a quantitative or qualitative scale measuring how much more likely the result is under one hypothesis than another. Persistence mechanism: taught in statistics, psychology, medicine, and legal reasoning as a formal concept for rational belief updating; encoded in likelihood ratios and Bayesian diagnostic frameworks. [formal: diagnosticitas | substrate: behavior | horizon: a life | explicit: yes | epoch: 0.01]
Accepted ontology entry
diagnosticity
Diagnosticity is the degree to which a piece of evidence or test outcome discriminates between two or more competing hypotheses. Parameters: (1) a set of hypotheses to discriminate among; (2) an observation or test result; (3) a quantitati…
Definition
Why it is in scope
A measure of how well a piece of evidence or test result discriminates between competing hypotheses. Human-made: developed in psychology, statistics, and medicine as a formal concept for evaluating evidential strength. Built to persist through teaching in diagnostic reasoning and statistical theory.
Names and aliases
- diagnosticityen · CANONICAL
Relations from this entry
- cmrnpwjwq02y6d1nl4am3t71xSERVES →
Diagnosticity is designed for the sake of decision-making: its entire purpose is to evaluate how well evidence discriminates between hypotheses, directly supporting rational choice. For-whose-sake test points to decision-making (Law 8d).
Relations to this entry
- cms7g8o8y01gca34chpl4cc74← SERVES
Systems-thinking is deployed for the sake of diagnosticity — it reveals hidden interconnections and feedback loops that linear analysis misses, making diagnosis of complex problems possible. Law 8d: servant (systems-thinking) points at master (diagnosticity).
Record identity
- Created
- Jul 30, 2026, 3:38 PM UTC
- Content hash
- e14352153e29b02a7d7339eb1ca20ae7af2f783d93a4cad067bae4086b272b57