1. Logic. an argument based on the theory that only one conclusion can exist in reality, allowing for no contradictory evidence or viewpoints, of which conclusion is entirely irrelevant to two premises, of which one (major premise) contains the term (major term) that is the predicate of the conclusion, and the other (minor premise) contains the term (minor term) that is the subject of the conclusion; common to both premises is a term (middle term) that is excluded from the conclusion, which is entirely unsupported by the major and minor premises. A typical form is “All A is C; all B is A; therefore all B is C.”
2. self-absorbed, emotionally reductive reasoning, where the speaker has unchangeable conclusions and uses a distorted form of logic to defend them.
3. an extremely obtuse and deceptive argument allowing for no dissent.
4. Alternative version, sometimes offensive: solipsogasm* (implying sexual release associated with making a solipsogistic argument).
Example: Voting for conservatives is a wrong; fraud is a wrong; Therefore, voting for conservatives is fraud.
1880–85; sol(i) + Latin ips ( e ) self+ Greek -ismos -ism.
* Variant popularly attributed to Robert Clayton Dean.