medical diagnosis - identification of a disease from its symptoms. diagnosing, diagnosis - identifying the nature or cause of some phenomenon. differential diagnosis - a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs. medical prognosis, prognosis, prospect - a prediction of the course of a disease. diagnostic procedure, diagnostic technique - a procedure followed in making a medical diagnosis.
Definition: In logic, a form of deductive reasoning consisting of a major premise, a minor premise, and a conclusion. Adjective: syllogistic. Here is an example of a valid categorical syllogism: Major premise: All mammals are warm-blooded. Minor premise: All black dogs are mammals. Conclusion: Therefore, all black dogs are warm-blooded. In rhetoric, an abridged or informally stated syllogism is called an enthymeme.
1 A fallacy is so conceived that if an argument exhibits a fallacy, it is probably a bad one, but if the argument exhibits no such violation, it is a good one.  2 Fallacies are mistakes in reasoning that do not seem to be mistakes. 3  Indeed, part of the etymology of the word 'fallacy' comes from the notion of deception.